===================
Features
--------
- Adds exceptions that can be raised from Flask views to return standardized
JSON responses.
- Adds support for Action Provider schema definitions based on Pydantic.
- Migrates ActionStatus, ActionRequest, and ActionProviderDescription to
Pydantic classes.
Bugfixes
--------
- Modifies ActionProvider introspection endpoint creation on the
ActionProviderBlueprint so that HTTP requests with and without trailing
slashes receive the same results.
Documentation
-------------
- Action Provider Pydantic classes:
https://action-provider-tools.readthedocs.io/en/latest/toolkit/validation.html
- Action Provider Pydantic input schema support:
https://action-provider-tools.readthedocs.io/en/latest/examples/input_schemas.html#pydantic