feat: add aider-desk-appimage

[Cleboost]

Summary

• Add aider-desk-appimage package for AiderDesk (x86_64 + aarch64 AppImage)
• Includes desktop entry and icon
• Manifest intentionally leaves small fixable issues to validate PR Check auto-fixes (icon size, pkgver, pkgrel, redundant docs.description)

Test plan

• PR Check workflow runs and auto-commits icon resize, manifest fixes, and README table update
• PR recap comment lists the applied auto-fixes
• No blocking issues remain after bot commits

[github-actions]

Hi! Thanks for opening this PR and contributing to missing-aur.

I'll run the package checks shortly and post a recap comment when I'm done.
If anything needs a tweak, I may also push small fix commits to your branch.

Hang tight — I'll be back in a moment.

[Cleboost]

Package check recap

Checked packages: aider-desk

Auto-fixes committed

• Resized package icons to 64×64: packages/aider-desk/icon.png
• Removed empty docs block from packages/aider-desk/manifest.yaml
• Regenerated README package table: README.md

Status

All checks passed. Nothing blocking.

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Posted manually — the workflow failed to publish this recap (see fix pending on main).