Rename RPG-Kit to CoderMind (surface only) (#59)

## Summary

Surface-only rebrand of the agent-facing product from **RPG-Kit** to
**CoderMind**. The underlying RPG and RPG-Encoder technology (papers,
algorithms, the Repository Planning Graph concept) keeps its name. This
PR is intentionally **non-breaking** — CLI verbs, package name,
workspace directories, and Python module name all stay as `rpgkit*`
during this transition.

The new CLI tagline states this explicitly to bridge the gap for users:

```
CoderMind — Plan-first coding for Claude Code & GitHub Copilot
(formerly RPG-Kit — CLI commands rename in a future release)
```

## What changes (user-visible)

- `RPG-Kit/` directory → `CoderMind/` (204 file renames, git rename
detection preserves history)
- Top-level `README.md`: prose, paths, install URL `#subdirectory=`,
transition NOTE callout
- `CoderMind/README.md`: H1 includes `(formerly RPG-Kit)`, transition
NOTE, all prose + paths
- 3 CI workflow files: `name:`, `paths:` filter, `PROJECT_DIR` env var
- CLI banner: new ANSI Shadow `CoderMind` art (same font family as the
old `RPG-KIT` banner)
- CLI tagline: 2-line with positioning + transition bridge
- `--help` app description, `init` / `update` / `script` command
docstrings
- All Panel titles, StepTracker labels, completion / error messages in
init/update/version/check flows
- Initial-commit message scaffolded by `rpgkit init`
- Hook status echo line `[CoderMind] RPG status unavailable`

## What intentionally stays (avoids breaking v0.1.3 users)

Each of these has a migration concern that needs to ride with a future
release:

- CLI verbs: `rpgkit init/check/version/...`, `rpgkit hook`, `rpgkit
script`
- Slash commands: `/rpgkit.feature_spec`, `/rpgkit.code_gen`, etc.
- Package name: `rpgkit-cli`
- Workspace directories: `.rpgkit/`, `~/.rpgkit/workspaces/`
- Python package: `src/rpgkit_cli/`
- `.gitignore` sentinel `# RPG-Kit ignores ...` (upgrade detection)
- VS Code task label `RPG-Kit: load status` (dedup key in
`_install_claude_hooks`)
- 4 translated README files (translations need separate review)
- Internal docstrings / private helper comments

## Test plan

Manual smoke (in a fresh venv off `CoderMind/`):

- [x] `rpgkit` (no args) shows the new CoderMind banner and transition
bridge
- [x] `rpgkit --help` shows CoderMind app help and rebranded
`init`/`update`/`script` descriptions
- [x] `rpgkit version` shows the `CoderMind CLI Information` panel
- [x] `rpgkit check` ends with `CoderMind CLI is ready to use!`
- [x] `rpgkit init <project> --ai claude --script sh` runs the full init
flow (17 steps) with CoderMind branding in the Panel title, StepTracker,
and MCP server reference; project ends in a runnable state
- [x] Path-sensitive test suites pass in isolation: `test_e2e.py` 24/24,
`test_path_format.py` + `test_storage.py` +
`test_workspace_unified_layout.py` + `test_encoder_workspace_layout.py`
70/70

CI:

- [ ] `CoderMind Lint` workflow triggers on `CoderMind/**` (path filter
updated)
- [ ] `CoderMind Pre-Release` / `CoderMind Release` workflows pick up
`PROJECT_DIR=CoderMind`

Author: Bonytu

.github/workflows/rpgkit-lint.yml

@@ -1,4 +1,4 @@
-name: RPG-Kit Lint
+name: CoderMind Lint
 
 permissions:
   contents: read
@@ -7,13 +7,13 @@ on:
   push:
     branches: [main]
     paths:
-      - "RPG-Kit/**"
+      - "CoderMind/**"
       - ".github/workflows/rpgkit-*.yml"
       - ".github/workflows/scripts/rpgkit/**"
       - ".markdownlint-cli2.jsonc"
   pull_request:
     paths:
-      - "RPG-Kit/**"
+      - "CoderMind/**"
       - ".github/workflows/rpgkit-*.yml"
       - ".github/workflows/scripts/rpgkit/**"
       - ".markdownlint-cli2.jsonc"
@@ -30,4 +30,4 @@ jobs:
         uses: DavidAnson/markdownlint-cli2-action@v19
         with:
           globs: |
-            RPG-Kit/**/*.md
+            CoderMind/**/*.md

.github/workflows/rpgkit-pre-release.yml

@@ -1,11 +1,11 @@
-name: RPG-Kit Pre-Release
+name: CoderMind Pre-Release
 
 on:
   push:
     branches:
       - dev
     paths:
-      - "RPG-Kit/**"
+      - "CoderMind/**"
       - ".github/workflows/rpgkit-pre-release.yml"
       - ".github/workflows/scripts/rpgkit/**"
   workflow_dispatch:
@@ -17,7 +17,7 @@ jobs:
       contents: write
       pull-requests: write
     env:
-      PROJECT_DIR: RPG-Kit
+      PROJECT_DIR: CoderMind
     steps:
       - name: Checkout repository
         uses: actions/checkout@v4
@@ -28,7 +28,7 @@ jobs:
       - name: Prepare scripts
         run: chmod +x .github/workflows/scripts/rpgkit/*.sh
 
-      - name: Get RPG-Kit pre-release version
+      - name: Get CoderMind pre-release version
         id: get_tag
         run: .github/workflows/scripts/rpgkit/get-next-pre-version.sh "${{ github.run_number }}"
 

.github/workflows/rpgkit-release.yml

@@ -1,10 +1,10 @@
-name: RPG-Kit Release
+name: CoderMind Release
 
 on:
   push:
     branches: [main]
     paths:
-      - "RPG-Kit/**"
+      - "CoderMind/**"
       - ".github/workflows/rpgkit-release.yml"
       - ".github/workflows/scripts/rpgkit/**"
   workflow_dispatch:
@@ -16,7 +16,7 @@ jobs:
       contents: write
       pull-requests: write
     env:
-      PROJECT_DIR: RPG-Kit
+      PROJECT_DIR: CoderMind
     steps:
       - name: Checkout repository
         uses: actions/checkout@v4
@@ -27,7 +27,7 @@ jobs:
       - name: Prepare scripts
         run: chmod +x .github/workflows/scripts/rpgkit/*.sh
 
-      - name: Get next RPG-Kit version
+      - name: Get next CoderMind version
         id: get_tag
         run: .github/workflows/scripts/rpgkit/get-next-version.sh