Create a general documentation for Thoth CI/CD Pipelines

[mayaCostantini]

Is your feature request related to a problem? Please describe.
As a newcomer, it would be useful to me if a document summarizing how Thoth and AICoE CI/CD pipelines work was available as a reference to understand this aspect of the project.

Describe the solution you'd like
Create a single source of documentation (ideally with diagrams, links...) explaining Thoth's CI/CD pipelines, referring to more documentation on the tools used if needed. The main idea would be to explain what happens when some actions are executed by Thoth's users, what is triggered, where jobs are running, etc.

Describe alternatives you've considered
Reading documentations from several sources at the same time.

[codificat]

Thanks for raising this. I believe it should be part of thoth-station/core#330
/triage accepted
/priority important-soon
/sig docs

[sesheta]

@codificat: The label(s) triage/accepted cannot be applied, because the repository doesn't have them.

In response to this:

Thanks for raising this. I believe it should be part of thoth-station/core#330
/triage accepted
/priority important-soon
/sig docs

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[mayaCostantini]

/assign @codificat

[mayaCostantini]

/assign @mayaCostantini

[sesheta]

Issues go stale after 90d of inactivity.
Mark the issue as fresh with /remove-lifecycle stale.
Stale issues rot after an additional 30d of inactivity and eventually close.

If this issue is safe to close now please do so with /close.

/lifecycle stale

[harshad16]

/lifecycle frozen