fix(kit): add repository url for npm provenance publish (#18)

Empty repository.url fails sigstore validation (E422) when publishing with --provenance.

Co-authored-by: Cursor <cursoragent@cursor.com>

Author: rdlabo

projects/kit/package.json

@@ -1,6 +1,10 @@
 {
   "name": "@rdlabo/ionic-angular-kit",
   "version": "21.2.0-2",
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/rdlabo-team/ionic-angular-library.git"
+  },
   "peerDependencies": {
     "@angular/common": "^21.0.0",
     "@angular/core": "^21.0.0",