docs: add catalog info

[Zacharis278]

https://open-edx-proposals.readthedocs.io/en/latest/processes/oep-0055/decisions/0001-use-backstage-to-support-maintainers.html

Note: It does not make much sense to own this and not registrar, they are tightly coupled. If 2U is interested in owning this we should also claim ownership of registrar. To confirm this before merging

Registrar: openedx-unsupported/registrar#633

[coveralls]

Pull Request Test Coverage Report for Build 10063116042

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 55.473%

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Totals
Change from base Build 9550011651:	0.0%
Covered Lines:	168
Relevant Lines:	305

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💛 - Coveralls

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 58.22%. Comparing base (23fe26a) to head (d10fb9d).

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #193   +/-   ##
=======================================
  Coverage   58.22%   58.22%           
=======================================
  Files          25       25           
  Lines         395      395           
  Branches       66       66           
=======================================
  Hits          230      230           
  Misses        149      149           
  Partials       16       16           

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[schenedx]

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