Going to do these in batches.  Here is the first one.

Release Notes:

- Associated additional file extensions with known languages
(([#633](https://github.com/zed-industries/community/issues/633)),
([#1822](https://github.com/zed-industries/community/issues/1822))).
    - C++: `cxx`, `hxx`, `inl`
    - JavaScript: `cjs`
    - Python: `mpy`
    - TypeScript: `cts`, `d.cts`, `d.mts`, `mts`