[UI v2] feat: Adds block_schemas RQ queries

[devinvillarosa]

1. Starts RQ queries for block_schemas. This is needed for creating and editing a new block

Checklist

• This pull request references any related issue by including "closes <link to issue>"
  • If no issue exists and your change is not a small fix, please create an issue first.
• If this pull request adds new functionality, it includes unit tests that cover the changes
• If this pull request removes docs files, it includes redirect settings in mint.json.
• If this pull request adds functions or classes, it includes helpful docstrings.