test: add tests for deep select feature (PR benjitaylor#119)

- deep-select.test.tsx: 13 tests for pierce mode behavior
- element-identification.test.ts: 9 tests for direct text content
- react-detection.test.ts: tests for Remotion/RefForwarding skip patterns
- Add test script to package.json

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: alexgorbatchev

package/package.json

@@ -1,6 +1,6 @@
 {
   "name": "agentation",
-  "version": "2.3.2",
+  "version": "2.3.3-alex",
   "description": "Visual feedback for AI coding agents",
   "sideEffects": false,
   "license": "PolyForm-Shield-1.0.0",