- [ ] Have you signed the [CLA](http://www.ubuntu.com/legal/contributors/)? - [X] Have you added an entry to the changelog (`docs/reference/changelog.rst`)? ----- Hi folks! This PR introduces the new .NET plugin in accordance with the FO205 specification (.NET Snapcraft Plugin). I’ve created it as a separate file and included unit tests, integration tests, documentation, and a changelog entry. There are a few points I’d like to address before finalizing the PR: - Since the old .NET plugin is only available on `core22`, should we adjust the [current Snapcraft registration logic](https://github.com/canonical/snapcraft/blob/7651d96085a7d715b06764e4e5dff391fb68b4b1/snapcraft/application.py#L139-L141) to register the old one and unregister the new one on `core22`, while keeping the new one registered at the [craft-parts level](https://github.com/canonical/craft-parts/blob/ac6e1d249ee2eeb035f5ed7832ed9c450617c698/craft_parts/plugins/plugins.py#L57)? This should simplify things for newer bases, e.g. `core24` and above, as the new plugin wouldn't need to be manually registered for each. - Relates to the point above, but since the new plugin is not registered here, the integration tests fails because it only finds the old `dotnet` plugin. Any suggestions on how we can work around this? ~**Note:** This is being submitted as a draft PR until the spec is fully approved. In the meantime, we can discuss the points above.~