0.6.8

No breaking changes.

• New: create and delete support for Automation rules and
  UserDefinedStates, on top of the existing get/update/delete/trigger
  layer. SHCSession.create_automation_rule()/create_userdefinedstate()
  (+ async mirrors) POST to the SHC's local /automation/rules and
  /userdefinedstates endpoints (both undocumented in the official OpenAPI
  spec — traced via APK decompile and confirmed live with a create-then-
  delete round trip against a real Controller; see
  bosch-shc-api-docs/best_practice/undocumented-local-endpoints.md §10 for
  the full trigger/condition/action type registry this seeds). New
  SHCAutomationRule.delete()/SHCUserDefinedState.delete() (+ async)
  round out the lifecycle. Lays the groundwork for a boschshc-hass feature
  bridging a device's physical pushbutton press into a regular HA entity via
  an SHC-side automation, without needing a new HA event/device-trigger
  platform.