Upgrade TypeScript to 7

[woksin]

Summary

Bumps the only concrete typescript dependency in the Documentation repo to the TypeScript 7 native (Go) compiler.

Packages changed (1)

File	Package	Old	New
Source/package.json (devDependencies)	typescript	5.7.2	7.0.2

No other package.json in the repo declares a concrete typescript dependency. web/package.json (the Astro site built in CI) and Source/docs/Documentation/test-storybook/package.json do not declare typescript directly, so they were left untouched. @types/* and other packages were not modified. No typescript peer-dependency lower-bound ranges exist to preserve.

Package manager

Source is a Yarn 4.5.3 (Corepack) project. Lockfiles are git-ignored in this repo (yarn.lock, package-lock.json), so this PR contains only the package.json change — no lockfile diff.

Verification result — blocker

TypeScript 7.0.2 works as a CLI drop-in (tsc --version → Version 7.0.2), but the published typescript@7.0.2 native package no longer ships the compiler library API — it contains only lib/tsc.js plus a native-binary launcher and per-platform optional-dependency binaries. require('typescript').createProgram is undefined.

Consequences for the Source project:

• yarn install fails — Yarn 4's builtin compat/typescript patch expects the TS 5.x file layout (lib/_tsc.js) and errors with ENOENT ... lib/_tsc.js on the new package shape.
• yarn build / build:ts would fail — Source drives its build through typedoc, typedoc-plugin-markdown, and ts-node/esm, all of which consume the TypeScript compiler API as a library; that API is absent in TS7. typedoc also peer-requires ~5.x and reports the mismatch.

These are fundamental to the TS7 native package (CLI-only), not fixable by a config tweak, so the version bump is kept and flagged for human review.

CI impact

None expected. The docs-site.yml workflow builds Documentation/web (Astro), which does not declare typescript and resolves it transitively (~5.x via typedoc). The Source project is not built in CI, so CI should remain green despite the Source toolchain incompatibility above.

Workflow changes

None. No workflow under .github/workflows/ pins a typescript version or installs tsc explicitly.

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