Update search tool to include filename matches

[codegen-sh]

This PR updates the search tool to include filenames in search results, addressing the issue where searching for a specific filename would return no results even if the file exists.

Changes:

• Added a filename_match field to the SearchFileResult class to indicate when a filename matches the search query
• Updated the ripgrep implementation to use find command to search for matching filenames
• Updated the Python implementation to check filenames against the search query
• Added visual indication in the search results when a filename matches the query
• Updated documentation to mention that search includes filenames

Testing:

The updated search tool will now return files whose names match the search query, even if the file content doesn't contain the query. This makes it easier to find specific files in the codebase.

For example, searching for "search.py" will now return the file even if the content doesn't contain that exact string.

Fixes the issue where the search tool was not taking into account filenames.

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