Fix CI build issues and professionalize tool integration

- Fixed malformed solution file configuration mappings causing CI failures
- Added Directory.Build.props to provide default RevitVersion for CI NuGet restoration
- Removed hardcoded development fallback paths in ViewModel
- Fixed UI layout bug in QuickMsiBuilder.UI where fields overlapped
- Reverted all manual changes to existing project files to strictly adhere to "Zero Breaking Changes"
- Integrated new projects into the Nuke build pipeline properly

Co-authored-by: chuongmep <31106432+chuongmep@users.noreply.github.com>

Author: google-labs-jules[bot]