Check for and create compiled files when requiring

Check to see if an equivalent `.rabbit` file exists in the same directory, and, if so, decompile that instead of running the original `.rab`.

Locate the implementation of requiring a file and inspect how `.rab` files are currently handled. Check whether a same-directory `.rabbit` file is available, use it for decompilation when appropriate, and verify the behavior with the project's existing tests or a focused reproduction.

Written by the indexing model from the issue text.