[UI v2] feat: Adds block document create page

[devinvillarosa]

1. Adds Block Document Create flow to ui-v2

Note: We still need to revisit the Schema component for this to work properly. But overall, this is a good starting point for creating a new block document

Screen.Recording.2025-05-02.at.8.26.55.AM.mov

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.