chore: update Claude Code and MCP auto-approve settings

Added auto-approval for common safe operations:
- Git add and commit commands
- Serena MCP replace_regex tool

This improves workflow efficiency during development.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

.mcp.json

@@ -20,7 +20,8 @@
           "read_file",
           "find_file",
           "list_dir",
-          "think_about_collected_information"
+          "think_about_collected_information",
+          "replace_regex"
         ]
       }
     },