CIP-0099? | Proof of Onboarding (cardano-foundation#546)

* CIP-????: POO Protocol

Initial Commit/PR

* Update with relevant links to the PR

* Fix YAML format

* Fix YAML format

* Rollback changes to the CIP-13 README.md and add to the Proof of Onboarding README.md and update name and other clarifications per feedback. Also fixed in-file JSON errors that were causing problems.

* Minor update to document progress on acceptance criteria and implementation actions taken in July 2023.

* Update examples to properly reflect that the API server should return the tokens array with hex-encoded asset names and not ASCII asset names.

* Remove Version 2 for now as it is unnecessary at this time, let's keep it simple for the sake of early adoption.

* Fix minor typo in an example

* fix header level

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* fix header level

* fix header level

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* fix header level

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* fix header level

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* fix header level

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* fix header level

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* fix header level

* fix header level

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* fix header level & add explicit section title

* fix header level

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* Update CIP-XXXX/README.md

* fixed glitch from edit during CIP meeting

* Update CIP-XXXX/README.md

Co-authored-by: Ryan Williams <[email protected]>

* Update CIP-XXXX/README.md

Co-authored-by: Ryan Williams <[email protected]>

* Changes to CIP-99:
* Language edits, additions, and modifications to bring the document in line with community and editor feedback.
* Addition of explicit versioning and modification criteria

* Updates to the implementation plan and acceptance criteria for CIP-99

* Update CIP-99 to active status

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Co-authored-by: Robert Phair <[email protected]>
Co-authored-by: Ryan Williams <[email protected]>