Currently, text search functionality is oriented toward searching across all files or a broad set of files. There is a need for a targeted tool that:

• Efficiently searches for a given regex pattern in a single specified file.
• Supports searching for the same regex pattern across a user-provided list of files (not the entire repo or directory tree).
• Returns detailed match information (file, line number, match context, etc.).
• Handles exceptions for invalid regex or file issues (missing, unreadable, etc.).
• Optionally supports context lines around matches.
• Follows the existing tool conventions: supports a max characters output limit and returns a structured response object that indicates whether output was truncated, how many characters were returned, and other relevant metadata.

Potential Benefits:

• Allows more focused and faster searches when the user knows the relevant file(s).
• Reduces unnecessary IO and improves performance for targeted queries.
• Consistent interface and output structure with other search tools.

Acceptance Criteria:

• New tool can search a regex in a single file and/or a provided list of files.
• Handles all edge cases for missing or invalid files and regex errors.
• Outputs match metadata (file, line, context).
• Optionally supports context lines in output.
• Accepts and applies a maximum character output limit.
• Returns a response structure indicating if the output was truncated, how many characters were returned, and other relevant metadata, matching conventions of existing search tools.