feat: tools & unify services-mktplace repositories

[ntorga]

Sometimes we get people asking to install tools that doesn't have daemons, like wkhtmltopdf, claude or chrome-headless. Therefore, we should have a way to install them via the interface, plug-n-play style.

Since we'll now have 3 types of installables: services, marketplace & tools, we may as well unify them into a single Git repository. That way we have less sync work to do and it's easier for the DevOps team to manage.

When adding the tools to the UI, we should also put all 3 into the same place. The Overview could benefit from it. Say we had on the same place but tab divided: Marketplace | Services | Tools.

We don't need to look at those 3 together, we usually only look at one per time, so having all three on the same place but tab-separated, we would reduce the amount of GET data during refreshing and when the user changes tab we can emit a refresh so the info is always fresh.