Revise repository documentation for devfiles

[michael-valdron]

Which area/kind this issue is related to?

/area releng
/area documentation

Issue Description

A review and revising of all the documentation in devfile repositories, including READMEs. This includes adding missing instructions, updating outdated information and separation of documentation where it makes sense.

Acceptance Criteria

• Revise repository documentation for API #1188
• Revise repository documentation for community registry #1189
• Revise repository documentation for registry-support #1186
• Revise repository documentation for registry-operator #1190
• Revise repository documentation for devfile library #1191
• Revise repository documentation for devfile-web #1187

[michael-valdron]

Partial revision of the index server README completed and ready for review: devfile/registry-support#176

[michael-valdron]

This issue should be an epic, converting the acceptance criteria items into child issues with their owners and this item into an epic.

[michael-valdron]

/kind epic

[michael-valdron]

This issue has been converted into an epic. Tracking will now be done by each component documentation task item.

[michael-valdron]

All uncompleted issues are stale, closing this epic issue until there is priority.