Workaround to fix VS build hang in certain scenarios

[philnach]

This change Fixes #163 by switching from exec dotnet to using msbuild.

Root cause:
The custom target in the projects: dotnet publish --configuration $(Configuration) --no-build -p:PublishProfile=FolderProfile"

• msbuild(1) spawns process -> dotnet (2) spawns process -> publish (3)
• (2) process exits
• But (3) process still has the output/error pipe open (even though it might not be actively writing)
  WaitForExit on MSBuild side is waiting for this pipe to close and app hangs

A better analysis is provided here and why it is problematic:
Process.WaitForExit() hangs forever even though the process has exited in some cases · Issue #29232 · dotnet/runtime

Fix:
Switch to using msbuild vs. exec dotnet

How validated:

1. Build succeeds locally
2. Ran Validate all .NET projects and confirmed successful output: https://github.com/philnach/data-migration-desktop-tool/actions/runs/12909585465

[markjbrown]

@philnach and @bowencode is this good to go?