chore(Sky): Remove Astro generated build artifacts

Delete three auto-generated files from the .astro/ build cache directory that should not be committed:
- collections.json (Astro content collections cache)
- content.d.ts (generated TypeScript declarations)
- types.d.ts (generated TypeScript declarations)

These are build-time artifacts that are regenerated on each build and should be in .gitignore.

Author: NikolaRHristov