Got that swagger

[zambien]

Add Swagger documentation for all APIs

Description

This PR adds swagger documentation for all of the APIs.

Motivation and Context

This may ease use of the APIs. It was a good learning exercise for me to understand what the plugin is doing. I'm not entirely convinced Swagger is a great fit but thought to PR in case there is some value.

How Has This Been Tested?

I tested this using the swagger UI and the setup in the immutability project (for vault and the plugin). I used testnet with a few throwaway hashes.

Types of changes

• [x] Documentation enhancement
• [ ] Bug fix (non-breaking change which fixes an issue)
• [x] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• [x] My code follows the code style of this project.
• [ ] My change requires a change to the documentation.
• [x] I have updated the documentation accordingly.
• [ ] I have read the CONTRIBUTING document.

[zambien]

Removed all the comments and such for generation as we discussed. Just using swagger.json now which we can update as changes are made going forward.