Run linting without building the native code

[kraenhansen]

Tracking two related TODOs in the lint job of .github/workflows/check.yml.

The lint job currently has to set up a full native toolchain — JDK 17, the Android SDK + NDK, and the x86_64-linux-android Rust target — and then bootstrap two packages, purely so that type-checking has types to work with:

react-native-node-api/.github/workflows/check.yml

Lines 62 to 63 in 29a527d

	# Set up JDK and Android SDK only because we need weak-node-api, to build ferric-example and to run the linting
	# TODO: Remove this once we have a way to run linting without building the native code

react-native-node-api/.github/workflows/check.yml

Lines 76 to 77 in 29a527d

	# Bootstrap weak-node-api and ferric-example to get types
	# TODO: Solve this by adding an option to ferric to build only types or by committing the types into the repo as a fixture for an "init" command

That is a lot of wall-clock time and cache surface for a job whose actual output is ESLint, Prettier, depcheck and publint results. It also couples the fastest-feedback job to the health of the native toolchain: an NDK or rustup hiccup fails linting on a pure-TypeScript PR.

Two things need solving, and they can be tackled independently:

1. weak-node-api — pnpm --filter weak-node-api run bootstrap is run for its generated types. Splitting the generation of the TypeScript/C++ declarations from the actual native build would let the lint job generate types only, dropping the JDK/Android SDK/NDK setup.
2. ferric-example — as the existing TODO suggests, either add an option to ferric to emit only the .d.ts (skipping the Cargo build), or commit the generated types into the repo as a fixture — the latter doubles as the fixture an init command would need (Ferric init command #299).

Once both are addressed, the JDK, Android SDK and rustup target add steps can be removed from the lint job.

[kraenhansen]

Resolved by #435, merged to next:

• weak-node-api: the lint job now runs prebuild:prepare (header copy + C++/TS declaration codegen) instead of bootstrap, dropping the native CMake build.
• ferric-example: went with the "commit the generated types as a fixture" option rather than a types-only build — ferric build --dts-only was added too (for regenerating the fixture by hand), but napi-rs's typegen turned out to always run a real cargo build under the hood, so a checked-in fixture is what actually keeps the lint job off the Rust toolchain. Two label-gated jobs that do a real ferric build now git diff --exit-code the fixture to catch drift.

The JDK 17, Android SDK, and rustup target add steps are gone from .github/workflows/check.yml's lint job on next. Closing.

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