Upgrade @actions/github to v9, @octokit/core to v7, and related plugins

- @actions/github: ^6.0.0 → ^9.0.0
- @octokit/core: ^5.0.1 → ^7.0.0
- @octokit/plugin-request-log: ^4.0.0 → ^6.0.0
- @octokit/plugin-retry: ^6.0.1 → ^8.0.0
- Update tsconfig.json to use moduleResolution: "bundler" for ESM exports map support
- Update import paths for new package structures
- Update build:types script for compatible compiler options

Co-authored-by: angel-jiakou <115738347+angel-jiakou@users.noreply.github.com>
Agent-Logs-Url: https://github.com/actions/github-script/sessions/17de5ca1-8bdc-41e4-a06d-ab2d8c2e6e8c

tsconfig.json

@@ -1,7 +1,8 @@
 {
   "compilerOptions": {
-    "target": "es2018",
-    "moduleResolution": "node",
+    "target": "es2022",
+    "module": "es2022",
+    "moduleResolution": "bundler",
     "strict": true,
     "forceConsistentCasingInFileNames": true
   },