Summary

• Adds RenameParentDirectoryIfMatches method to rename the project's parent directory when it matches the old project name
• Only renames directory if folder name matches old project name (case-insensitive)
• Returns updated project file path after directory rename

Example

Before: C:\Projects\MyProject\MyProject.csproj
After:  C:\Projects\NewName\NewName.csproj

Test plan

• Test with project where folder matches project name - directory should rename
• Test with project where folder differs from project name - directory should NOT rename
• Verify project file path is correctly updated after rename

Closes #21