chore: prepare GoodBuddy 0.12.0 release

Update the desktop version, approved bilingual release notes, and synchronized English and Chinese feature matrices for the 0.12.0 candidate.

Release preparation now runs local tests, type checks, and lint without a local production build, then requires the main-branch CI build before tagging. The package matrix uses a native Windows arm64 runner and validates managed Python on every target without adding extra license files to the desktop package.

package.json

@@ -1,6 +1,6 @@
 {
   "name": "goodbuddy",
-  "version": "0.11.14",
+  "version": "0.12.0",
   "private": true,
   "description": "Secure desktop AI workspace with controlled Agent Runtimes",
   "desktopName": "GoodBuddy",