glandais / virtual-cyclist / 29356455775

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chore: migrate to stable TypeScript 7 native compiler (#112)

* chore: migrate to stable TypeScript 7 native compiler

TypeScript 7 is now stable, so drop @typescript/native-preview
(tsgo dev builds) in favor of the stable native compiler:

- @typescript/native -> npm:typescript@7 (native compiler)
- typescript stays on the real v6 package, whose stable programmatic
  API is what typescript-eslint consumes (v7 API only lands in 7.1)

typecheck and build:types invoke the native compiler by explicit path
to avoid the tsc bin-name conflict between the two typescript packages.

* ci: drop 'npm install -g npm@latest' step

npm@latest (12.x) dropped support for Node 25, which the workflows pin,
so the step fails before dependencies are even installed. The Node 25
bundled npm (11.x) handles the npm: aliases fine, so the step is
unnecessary.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

* style: format HOW_IT_WORKS.md with prettier

Pre-existing formatting drift (unrelated to the TS 7 migration) that
fails the format:check CI step. Applying prettier --write to unblock.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

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Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

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