Add tests and implement functionality for staged cascade search and LSP expansion

- Introduced a new JSON file for verbose output of the Codex Lens search results.
- Added unit tests for binary search functionality in `test_stage1_binary_search_uses_chunk_lines.py`.
- Implemented regression tests for staged cascade Stage 2 expansion depth in `test_staged_cascade_lsp_depth.py`.
- Created unit tests for staged cascade Stage 2 realtime LSP graph expansion in `test_staged_cascade_realtime_lsp.py`.
- Enhanced the ChainSearchEngine to respect configuration settings for staged LSP depth and improve search accuracy.

ccw/frontend/src/locales/en/workspace.json

@@ -12,7 +12,12 @@
     "dialog": {
       "title": "Select Project Folder",
       "placeholder": "Enter project path...",
-      "help": "The path to your project directory"
+      "help": "The path to your project directory",
+      "selectCurrent": "Select This Folder",
+      "parentDir": "Parent Directory",
+      "loading": "Loading...",
+      "emptyDir": "Empty directory",
+      "accessDenied": "Cannot access this directory"
     }
   },
   "actions": {