Create IndexOfDocPieces

[orensbruli]

File to content documentation "clues". Probably a starting point if you decide to also open the Documentation to contributions.

What's new

First titles an some links to doc clues.

Verification

It's just a starting point for documentation. No way to verify it that I can guess

Checklist (For Reviewer)

• [ ] PR has description of feature/bug or link to Confluence/Jira task
• [ ] Description contains actions to verify feature/bugfix
• [ ] I've built this code, uploaded it to the device and verified feature/bugfix