feat(INFRA-2864): add remove rca gha (#109)

- Self-contained TypeScript script that integrates with Google Sheets and GitHub APIs
- Reusable workflow pattern consumable by multiple repositories
- Dynamic column detection for flexible Google Sheet structures
- Comprehensive error handling with dry-run mode for safe testing
- Security improvements including GraphQL injection prevention and exact version pinning

.depcheckrc.json

@@ -11,6 +11,8 @@
     "@swc/cli",
     "@swc/core",
     "ts-node",
-    "typedoc"
+    "typedoc",
+    "@actions/core",
+    "@actions/github"
   ]
 }