Add setup recipe for code editors (Arch-only)

[yukazakiri]

Summary

Add a new /setup-editors recipe at scripts/setup/editors.sh that:

• Prompts the user to choose one editor/IDE to install.
• Supports Arch-based installs for:
  • VS Code (visual-studio-code-bin, AUR)
  • OSS Code (code, AUR)
  • Zed (zed-bin, AUR)
  • Cursor (cursor-bin, AUR)
  • Neovim + LazyVim starter
• Detects non-Arch distros first, notifies users that support is coming soon.
• Keeps contribution simple by using a single-file, easy-to-edit editor list.

Testing

• inir restart && inir logs — no errors
• Tested the specific feature path that changed
• Both panel families checked (if shared code changed)

Notes

Closes #

[yukazakiri]

Updated this PR with the following changes:

• AUR-only install: install_arch now routes all packages (repo + AUR) through paru or yay, never pacman directly. This simplifies the flow and lets the helper handle everything consistently.
• Prefer paru over yay: when both are installed, paru is chosen first.
• error handling: added a detailed error trap that prints exit code, line number, file, function, failed command, and a full stack trace. No more cryptic "error on line 110".
• Pause on error: the terminal now waits for Enter before closing when something fails, so you can actually read the error.
• TRACE mode: set TRACE=1 before running to enable bash set -x for full command debugging.
• Neovim entry fix: moved neovim and git to the AUR column so they are installed via the AUR helper too.

Please re-test /setup-editors on your Arch machine and let me know if the error messages are clear enough now.

[snowarch]

Thanks @yukazakiri — same pattern, looks good. Queued behind #165 for an install test. The Arch-only scope with a "coming soon" path for other distros is fine for now.