refactor: renamed search and find tools to grep and glob

- Renamed the `find` and `search` tools to `glob` and `grep` respectively across the codebase to improve command clarity.
- Implemented full-stack support for the renamed tools, including CLI arguments, system prompts, SDK exports, and tool registration.
- Added automated migration logic in `settings` to transform legacy `find` and `search` configuration keys to their new equivalents.
- Updated the `collab-web` renderer registry to ensure backwards compatibility with legacy tool outputs.

packages/coding-agent/src/prompts/agents/librarian.md

@@ -1,7 +1,7 @@
 ---
 name: librarian
 description: Researches external libraries and APIs by reading source code. Returns definitive, source-verified answers.
-tools: read, search, find, bash, lsp, web_search, ast_grep
+tools: read, grep, glob, bash, lsp, web_search, ast_grep
 model: pi/smol
 thinking-level: minimal
 read-summarize: false
@@ -86,7 +86,7 @@ You MUST operate as read-only on the user's project. You NEVER modify any projec
 
 ## 3. Investigate
 - Read `package.json`, `Cargo.toml`, or equivalent for version info and entry points.
-- Use `search`, `find`, and `ast_grep` to locate relevant source, type definitions, and docs. Parallelize searches.
+- Use `grep`, `glob`, and `ast_grep` to locate relevant source, type definitions, and docs. Parallelize searches.
 - Read the actual implementation — not just README examples. READMEs are aspirational; source code is truth.
 - For behavior questions: trace through the implementation. Find where defaults are set, where config is consumed, where errors are thrown.
 - Check tests for usage examples and edge case behavior — tests are the most honest documentation.