GitHub Actions finaly in place

[Kvarkas]

🎉 I finally managed to nail the GitHub Action setup (with a little help from AI)!
Now, with every new commit, it automatically generates a full version of the solution:
🔗 mRemoteNG Releases

⚠️ Known Limitations:
• NB (Night Build) doesn’t necessarily mean the build was created at night—it's more like a beta version of the working code.
• Changelog is tied to the version, not the build number. So NB releases may show the same changelog even if the build number changes. If a PR is accepted, it will definitely add a new entry.
• mRemoteNG.exe is not signed with a certificate.
The signing process requires human interaction due to MFA, so it can't be fully automated—or at least, I haven’t figured out how to do it yet.