[Rhasspy3] refactor connections

[Nailik]

Changes:

• remove define custom endpoints for domains in connection , http -> custom endpoints
• remove cusom http intent handling

Initial:

• one internal webserver connection that can only be deactivated

Ui:

• 4 list items that open the config pages:

  • webserver (shows active/inactive)
  • mqtt (shows connection details)
  • http -> opens separate page

• Multiple http page:

  • contains add connection button
  • when creating server it's capabilities can be toggled (or added from a list?):
  • rhasspy 2
  • rhasspy 3 wyoming
  • Homeassistant

each list page has an add connection button

• each http usage has a button to select which server to be used (list)