perf: Optimize MSBuild project loading and dependency handling

Introduced caching for MSBuild project loading to improve performance and prevent redundant loads. Added mechanisms to avoid infinite recursion during dependency processing and ensured sequential handling of project references to address MSBuild limitations.

Refactored package upgrade logic to simplify checks and reuse cached projects for NuGet reference updates. Enhanced error handling with detailed logging for unexpected exceptions.

Added cleanup methods to unload and dispose of cached projects, ensuring proper resource management. Improved handling of NuGet restores and platform updates by re-evaluating project properties post-restore.

Updated dependency processing to ensure all assemblies are registered and dependencies are loaded recursively. Finalized with proper state updates for packages and session-wide cleanup of cached projects.

Author: laske185