CI

[impworks]

The new Github action does the following:

• Finds the last 5.0.x version tag, increments by 1 (or defaults to 5.0.0 for first run)
• Creates the NuGet package
• Creates a VS Code plugin
• Creates a VS plugin
• If not dry_run:
  • Pushes the NuGet package to the repo using "Trusted publishing"
  • Creates a Github release with all artifacts attached to it

Current limitations:

• No automatic pushes to VS / VS Code marketplaces. Not sure how to do that - Claude requests a PAT from Azure DevOps (?) which seems to be paid. Maybe I need to push the first version manually and then I get some kind of credentials for automatic update
• No Rider plugin built. It appears that we need a 3.4GB SDK download which expands to 14GB - does not fit onto the 10GB disk for a Github runner. There is likely a better approach, but let's tacke it in a follow-up PR.