Add Remote calendar integration (#138862)

* Add remote_calendar with storage

* Use coordinator and remove storage

* cleanup

* cleanup

* remove init from config_flow

* add some tests

* some fixes

* test-before-setup

* fix error handling

* remove unneeded code

* fix updates

* load calendar in the event loop

* allow redirects

* test_update_failed

* tests

* address review

* use error from local_calendar

* adress more comments

* remove unique_id

* add unique entity_id

* add excemption

* abort_entries_match

* unique_id

* add ,

* cleanup

* deduplicate call

* don't raise for status end de-nest

* multiline

* test

* tests

* use raise_for_status again

* use respx

* just use config_entry argument that already is defined

* Also assert on the config entry result title and data

* improve config_flow

* update quality scale

* address review

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Co-authored-by: Allen Porter <allen@thebends.org>

CODEOWNERS

@@ -1252,6 +1252,8 @@ build.json @home-assistant/supervisor
 /tests/components/refoss/ @ashionky
 /homeassistant/components/remote/ @home-assistant/core
 /tests/components/remote/ @home-assistant/core
+/homeassistant/components/remote_calendar/ @Thomas55555
+/tests/components/remote_calendar/ @Thomas55555
 /homeassistant/components/renault/ @epenet
 /tests/components/renault/ @epenet
 /homeassistant/components/renson/ @jimmyd-be