[WIP] [Feat] Conditional Notifications

[petar-qb]

Description

Screenshot

TODO

• - Refactor _action.py and the way how action notification is extracted and calculated.
• - Pass through todos and done or open question.
  If we enable text -> va.show_notification(...) conversion, this would look like: notifications={"progress": "Exporting data...", "success": "Data exported successfully!", "error": "Export failed!",},
• - See ticket issue and cover other edge cases if any.
• - Check other actions like filter/parameter. What happens if they fail.
  One pros of introducing update_figures is that we don't have to copy-paste similar code for many actions.
• - Check what happens with the actions chain when no_update, PreventUpdate, or Exception is raised.
• - add a page that tests an action with different output type [None, data, [data], {"output_id": data}] Make sure that all the combinations are covered.
• - fix lint and failing unit tests
• - see schema
• - write docs
• - write changelog

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