* Allow Just-in-Time platform setup for mqtt
* Only forward the setup of new platforms
* Fix new platforms being setup at reload + test
* Revert not related changes
* Remove unused partial
* Address comments, only import plaforms if needed
* Apply suggestions from code review
* Add multipl platform discovery test
* Improve test
* Use a lock per platform
Use async_forward_entry_setups so platforms can be loaded in a single
executor job instead of many:
Currently they all have to create a new job because it did not use
async_forward_entry_setups
```
2024-03-08 08:29:29.819 DEBUG (MainThread) [homeassistant.loader] Importing platforms for mqtt executor=[light] loop=[] took 12.12s
2024-03-08 08:29:29.822 DEBUG (MainThread) [homeassistant.loader] Importing platforms for mqtt executor=[number] loop=[] took 12.12s
2024-03-08 08:29:29.826 DEBUG (MainThread) [homeassistant.loader] Importing platforms for mqtt executor=[scene] loop=[] took 12.13s
2024-03-08 08:29:29.829 DEBUG (MainThread) [homeassistant.loader] Importing platforms for mqtt executor=[select] loop=[] took 12.13s
2024-03-08 08:29:29.833 DEBUG (MainThread) [homeassistant.loader] Importing platforms for mqtt executor=[sensor] loop=[] took 12.14s
2024-03-08 08:29:30.882 DEBUG (MainThread) [homeassistant.loader] Importing platforms for mqtt executor=[update] loop=[] took 13.18s
2024-03-08 08:29:30.948 DEBUG (MainThread) [homeassistant.loader] Importing platforms for mqtt executor=[button] loop=[] took 13.18s
2024-03-08 08:29:30.949 DEBUG (MainThread) [homeassistant.loader] Importing platforms for mqtt executor=[climate] loop=[] took 13.19s
2024-03-08 08:29:31.012 DEBUG (MainThread) [homeassistant.loader] Importing platforms for mqtt executor=[fan] loop=[] took 13.25s
2024-03-08 08:29:31.019 DEBUG (MainThread) [homeassistant.loader] Importing platforms for mqtt executor=[humidifier] loop=[] took 13.25s
2024-03-08 08:29:31.024 DEBUG (MainThread) [homeassistant.loader] Importing platforms for mqtt executor=[image] loop=[] took 13.26s
2024-03-08 08:29:31.034 DEBUG (MainThread) [homeassistant.loader] Importing platforms for mqtt executor=[lock] loop=[] took 13.27s
2024-03-08 08:29:31.045 DEBUG (MainThread) [homeassistant.loader] Importing platforms for mqtt executor=[vacuum] loop=[] took 13.28s
2024-03-08 08:29:31.050 DEBUG (MainThread) [homeassistant.loader] Importing platforms for mqtt executor=[valve] loop=[] took 13.28s
```
* Add ServiceValidationError
* Add translation support
* Extend translation support to HomeAssistantError
* Add translation support for ServiceNotFound exc
* Frontend translation & translation_key from caller
* Improve fallback message
* Set websocket_api as default translation_domain
* Add MQTT ServiceValidationError exception
* Follow up comments
* Revert removing gueard on translation_key
* Revert test changes to fix CI test
* Follow up comments
* Fix CI test
* Follow up
* Improve language
* Follow up comment
* Do not trigger reload when unloading MQTT entry
* More cleanup
* cleanup async_reload_manual_mqtt_items
* Add test
* Improve test
* Remove unuse mocks from test
* Add discovery item in test
* Make sure MQTT is available starting mqtt_json
* Wait for mqtt client
* Sync client connect
* Simplify
* Addiitional tests async_wait_for_mqtt_client
* Improve comment waiting for mqtt
* Improve docstr
* Do not wait unless the MQTT client is in setup
* Handle entry errors during setup
* More comments - do not clear event
* Add snips and mqtt_room
* Add manual_mqtt
* Update homeassistant/components/mqtt/__init__.py
Co-authored-by: J. Nick Koston <nick@koston.org>
* Use a fixture, improve tests
* Simplify
---------
Co-authored-by: J. Nick Koston <nick@koston.org>
* Cleanup config merging and adding defaults
* Optimize and update tests
* Do not mix entry and yaml config
* Make sure hass.data is initilized
* remove check on get_mqtt_data
* Tweaks to MQTT client
* Remove None assigment mqtt client and fix mock
* Remove async_setup from mqtt integration
* Final update common tests
* Related tests init
* Related tests diagnostics
* Related tests config_flow
* Cleanup and correct test
* Keep websockets_api commands in async_setup
