chore(release): v2.65.1 - g1nation rebranding & Antigravity support

- Finalized personal branding for g1nation.
- Integrated Antigravity platform support in README.md.
- Rebuilt VSIX package with new identifier (g1nation.astra).

package.json

@@ -2,7 +2,7 @@
   "name": "astra",
   "displayName": "Astra",
   "description": "The personal intelligence layer for Antigravity and VS Code. A private cognitive partner for deep project context, memory, and proactive strategic decision-making.",
-  "version": "2.65.0",
+  "version": "2.65.1",
   "publisher": "g1nation",
   "license": "MIT",
   "icon": "assets/icon.png",