fix(license): restore the MIT disclaimer, credit third-party components, ship the file (#1437)

## Description

Yes, it needed updating, on three counts.

**1. The MIT text was incomplete.** The final paragraph was missing, so
the grant carried no warranty disclaimer and no limitation of liability.
The all-caps block further down belongs to ExecuTorch's BSD notice and
is scoped to ExecuTorch. Restored the standard paragraph.

**2. The third-party list predates the rewrite.** It has not been
touched since #506. Only ExecuTorch is credited, but shipped binaries
also link:

| Component | License | Where |
| --- | --- | --- |
| pffft / FFTPACK | BSD 3-Clause | `legacy/cpp/pfft`, compiled on both
platforms |
| OpenCV 4.11 | Apache-2.0 | vision pipelines, multimodal LLMs |
| KleidiCV | Apache-2.0 | OpenCV Arm HAL, Android |
| ada | MIT | `legacy/cpp/ada` |
| phonemis | MIT | text-to-speech frontend |
| MLX | MIT | MLX backend, iOS |

pffft and the Apache-2.0 components require the notice to be reproduced
in binary redistributions, which is what an app built on this library
is. Every license identifier and copyright line above was taken from the
upstream source, not inferred.

**3. No published package shipped a license at all.** npm only packs a
`LICENSE` that sits in the package directory, and ours lives at the repo
root, so every tarball went out with `"license": "MIT"` in the manifest
and no license text. Verified with `npm pack --dry-run`: 0 matches
before, `21.8kB LICENSE` after. `create-package.sh` now copies it in for
the pack and removes it again; the three satellite packages get their
own plain MIT copy.

Left the copyright year at 2024, which is the year of first publication
and does not need bumping.

The third-party section is a judgment call about what has to be
credited, so it is worth a second opinion before merging.

### Introduces a breaking change?

- [ ] Yes
- [x] No

### Type of change

- [x] Bug fix (change which fixes an issue)
- [ ] New feature (change which adds functionality)
- [ ] Documentation update (improves or adds clarity to existing
documentation)
- [ ] Other (chores, tests, code style improvements etc.)

### Tested on

- [ ] iOS
- [ ] Android

### Testing instructions

```
cd packages/react-native-executorch
cp ../../LICENSE LICENSE && npm pack --dry-run --ignore-scripts | grep LICENSE && rm LICENSE
```

### Checklist

- [x] I have performed a self-review of my code
- [x] I have commented my code, particularly in hard-to-understand areas
- [ ] I have updated the documentation accordingly
- [x] My changes generate no new warnings

Author: msluszniak

.gitignore

@@ -112,3 +112,6 @@ Makefile
 .claude
 skills-lock.json
 
+
+# copied in by scripts/create-package.sh so npm packs it, removed again after
+packages/react-native-executorch/LICENSE

LICENSE

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2024 Software Mansion
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

packages/bare-resource-fetcher/LICENSE

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2024 Software Mansion
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

packages/expo-resource-fetcher/LICENSE

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2024 Software Mansion
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

packages/react-native-executorch-webrtc/LICENSE

@@ -17,10 +17,19 @@ git -C "$(git rev-parse --show-toplevel)" submodule update --init --recursive \
 # `!scripts/build*` which npm-packlist honors and re-includes those files
 # despite our exclusion rules. Restore on exit so the working tree stays clean.
 PHONEMIS_DIR="third-party/common/phonemis"
-restore_phonemis() {
+
+# npm only picks up a LICENSE that sits in the package directory, and ours
+# lives at the repo root, so the published tarball carried no license text at
+# all. Several of the notices it now reproduces (ExecuTorch, pffft, OpenCV)
+# require that in a redistribution. Copy it in for the pack and drop it again
+# so the working tree stays clean.
+cp "$(git rev-parse --show-toplevel)/LICENSE" LICENSE
+
+cleanup() {
   git -C "$PHONEMIS_DIR" checkout -- data test scripts requirements.txt 2>/dev/null || true
+  rm -f LICENSE
 }
-trap restore_phonemis EXIT
+trap cleanup EXIT
 rm -rf "$PHONEMIS_DIR/data" "$PHONEMIS_DIR/test" "$PHONEMIS_DIR/scripts"
 rm -f "$PHONEMIS_DIR/requirements.txt"