[BD-46] docs: added support for internal md pages for components

[PKulkoRaccoonGang]

Description

• added support for internal md pages for components.

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[openedx-webhooks]

Thanks for the pull request, @PKulkoRaccoonGang!

This is currently a draft pull request. When it is ready for our review and all tests are green, click "Ready for Review", or remove "WIP" from the title, as appropriate.

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (f50fddd) 92.89% compared to head (6f6b927) 92.83%.
Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2875      +/-   ##
==========================================
- Coverage   92.89%   92.83%   -0.07%     
==========================================
  Files         235      235              
  Lines        4338     4245      -93     
  Branches     1056     1032      -24     
==========================================
- Hits         4030     3941      -89     
+ Misses        304      300       -4     
  Partials        4        4              

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