In this iteration, I'd like to let AI figure out that a package plugin is required to build a package, so we'll add more context in the agents.

Non-exhaustive things that come to my mind:

• Make sure a builder entrypoint is added when a package plugin is created
• When building from source, check if there is a Gitlab mirror already and if not, use Github but add a comment that a mirror has to be created (as TODO) and report in the AI summary when the tool is done.
• Analyze our current package plugins and document the why we need certain hooks in the current AGENTS.md, since we already have context for the hooks. The tool needs to be able to figure out that in a certain case, this hook is needed.