Add config-flow to Snapcast (#80288)
* initial stab at snapcast config flow
* fix linting errors
* Fix linter errors
* Add import flow, support unloading
* Add test for import flow
* Add dataclass and remove unique ID in config-flow
* remove translations
* Apply suggestions from code review
Co-authored-by: epenet <6771947+epenet@users.noreply.github.com>
* Refactor config flow and terminate connection
* Rename test_config_flow.py
* Fix tests
* Minor fixes
* Make mock_create_server a fixture
* Combine tests
* Abort if entry already exists
* Apply suggestions from code review
Co-authored-by: epenet <6771947+epenet@users.noreply.github.com>
* Move HomeAssistantSnapcast to own file. Clean-up last commit
* Split import flow from user flow. Fix tests.
* Use explicit asserts. Add default values to dataclass
* Change entry title to Snapcast
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Co-authored-by: Barrett Lowe <barrett.lowe@gmail.com>
Co-authored-by: epenet <6771947+epenet@users.noreply.github.com>
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