[Docs] Openapi docusaurus docs

[commoddity]

🌿 Summary

Generate Docusaurus docs automatically from the Open API spec in the repo.

Uses: https://github.com/PaloAltoNetworks/docusaurus-openapi-docs

Closes #1474

🌱 Primary Changes:

• Adds docusaurus-openapi-docs configs to autogenerate docs from the Ignite-generated Open API spec for the chain
• Adds related make targets

🛠️ Type of change

Select one or more from the following:

• Docs

[Olshansk]

@commoddity Do you mind resolving the merge conflicts here so we can merge it in tomorrow?

[Olshansk]

@commoddity

1. Can you resolve the merge conflicts with main and ensure this still works?
2. Why did we add a changelog.md?

[Olshansk]

@commoddity Bump