Improve code/schema validation before registering

[jl-santana]

More info about this can be found on this issue

Changes on this PR:

• Validate code & schema before registering the indexer
  Logic: If formatting either the code or the schema fails, the Publish button is disabled. Only if type generation errors or no errors are detected, the Publish button will be enabled. More about this on this discussion

Screen.Recording.2024-01-08.at.4.42.31.PM.mov

Additionally

• Created a reusable Modal with a global context to manage it, so we can trigger it from any component to display some info
• Updated schema with granular error types for improved clarity
• Created a custom error class to filter by type Error. We can add more fields on it if needed

[roshaans]

Changes look good to me. 💯

It would be nice though to clear out all errors that the user sees when they click the button to Reset Changes. At the moment the errors stay.