Fixes #4744: Search and replace tool now fails if search query matches multiple locations

- Added validation to check if search pattern matches multiple locations in file
- Tool now fails with descriptive error message when search query is not specific enough
- Suggests using more specific search query, line ranges, or apply_diff tool for precise targeting
- Added comprehensive test coverage for the new functionality
- Handles both global file searches and line range searches
- Limits displayed matches to 10 in error messages for readability

Author: roomote