docs: add requirements for adding a vendor component

[willarmiros]

Which problem is this PR solving?

• Fixes Proposal: Shared maintenance of vendor-specific components #333

Short description of the changes

• Adds a list of requirements for 3rd party vendors to add their components to this repo
• Adds conditions such components could be removed

[codecov]

Codecov Report

Merging #338 (387cc3f) into main (5ba4a48) will not change coverage.
The diff coverage is n/a.

❗ Current head 387cc3f differs from pull request most recent head 7af4dcf. Consider uploading reports for the commit 7af4dcf to get more accurate results

@@           Coverage Diff           @@
##             main     #338   +/-   ##
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  Coverage   94.34%   94.34%           
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  Files          10       10           
  Lines         407      407           
  Branches       44       44           
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  Hits          384      384           
  Misses         23       23