docs(app-of-apps): argoconfigs template

[hairmare]

Description

Add a section on the argoconfig lilbrary chart.

Issues

• [*-apps] We need usage docs for argoconfig and *-apps charts #84

Checklist

• I updated the version in Chart.yaml
• I updated applicable README.md files using pre-commit run
• I documented any high-level concepts I'm introducing in docs/
• If I updated a dependency tool, or app, this PR contains a short summary of the changes I'm pulling
• CI is currently green and this is ready for review
• I am ready to test changes after they are applied and released

[tongpu]

I'll have to read the second part again tomorrow, but here are some minor recommendations from my side regarding how to lead over to code snippets. I would use :, but I'm actually not sure if the English language might be different from German in this regard.

[hairmare]

i don't like : before code examples (in neither language) but i'm not religious about it ;)

[tongpu]

I think we're still not at the point where we're able to really explain the concept in layman's terms, but I'm not sure if this is even possible.

[hairmare]

I think we're still not at the point where we're able to really explain the concept in layman's terms, but I'm not sure if this is even possible.

This really only focuses on the library chart bits, #84 has some more tasks that should get us closer to explaning the big picture concept.