Remove debugpy as dependency?

debugpy is quite a heavy dependency, before it was a build dependency, but now it's standard:

It shows up as 28MB on disk
```
28M /Users/maartenbreddels/venvs/solara-size1/lib/python3.9/site-packages/debugpy
```

On pypi https://pypi.org/project/debugpy/#files it's ~5mb.

I'm not sure everyone needs a debugger, and in times of pyodide/pyscript, size matters :)

I think the code is already prepared for it (try block around the import).

No files or tests are named. Start by locating the dependency declaration and the guarded debugpy import referenced in the issue, then inspect how debugger support is packaged and exercised. Done means debugpy is no longer a required dependency while debugger behavior and package installation remain correct.

索引モデルが issue の本文から書いたものです。