Surface API errors (and success)

[j08lue]

We have designs for surfacing errors that occur during API interaction:

Recently, validation error messages from STAC FastAPI have been improved:

• return more information when pydantic raise validation error stac-utils/stac-fastapi#772

We should surface any API errors in the application such that they are helpful for the user to find out what they did wrong, in particular validation errors.

Dependencies

• Our reference deployment in EOEPCA needs to update STAC FastAPI >= 3.0.4 to get the improved validation error messages.

Acceptance criteria

• All STAC API errors surface
• Validation errors are formatted in a descriptive way, if possible
• While we are at it, also show a notification when an API transaction was successful, as indicated in the designs