Add debian and rpm packaging

[itsmesamster]

Include chipmunk-cli in release workflow
Remove README.md from tar release artifact
Remove the unused .release file
Add debian and rpm packaging

[AmmarAbouZor]

I've run checks using AI agent and got this result back. However, you are the domain expert so it's up to you to decide which of them needs to be fixed if any:

Review Generated by AI:

1. macOS CLI artifact is published unsigned

   • development/scripts/release_app.py:72, development/scripts/release_app.py:131
   • The new CLI .tgz is appended after macOS app signing/notarization and package_cli_portable() only copies the raw CLI binary. Since CI uploads all *.tgz, signed macOS releases will now include an unsigned chipmunk-cli@...-darwin*.tgz. Users downloading it with quarantine may be blocked by Gatekeeper. Sign/notarize the CLI artifact on macOS or skip publishing the macOS CLI archive.

2. Linux package directory modes depend on caller umask

   • development/packaging/linux/packages.py:325
   • make_dir() uses mkdir(parents=True) but only chmods the final directory. Parent directories created during staging inherit the process umask, so local release builds with restrictive umasks can produce DEB/RPM trees with bad directory modes. Walk and chmod each created directory under the staging root.