What this does:
- Sets up a `migrate_cpp` tool which currently only runs `clang-tidy`.
- This is intended to have more transformations in the future.
- Sets up a `migrate_cpp.sh` script.
- This copies the original woff2 code into a `carbon` directory and runs the `migrate_cpp` tool on it there.
- Adds the initial `carbon` directory of woff2
- To be clear, this is currently only updated via `clang-tidy`.
- More transformations should be expected in the future.
- Minor related edits. For example:
- Adjust pre-commit to skip the `carbon` directory, because it's third-party code and shouldn't be edited in the same way.
- Adds `@brotli_carbon` as a local repository so that we can "build" outputs.
- Makes clang-tidy from the bootstrap toolchain accessible for BUILD dependencies, as it's then used for `migrate_cpp`.
What this does not do:
- Any actual transformation of C++ code to Carbon
Co-authored-by: Matthew Riley <mdriley@gmail.com>
