Add config flow to System Monitor (#104906)
* Initial commit for config flow to System Monitor
* sensors
* Fixes
* Works
* Add import
* entity_registry_enabled_default = False
* entity_category = diagnostic
* Create issue
* issue in config flow
* Tests
* test requirement
* codeowner
* Fix names
* processes
* Fix type
* reviews
* get info during startup once
* Select process
* Legacy import of resources
* requirements
* Allow custom
* Fix tests
* strings
* strings
* Always enable process sensors
* Fix docstrings
* skip remove sensors if no sensors
* Modify sensors
* Fix tests
4f0ee20ec5