Add support for mouse down/up/long-click to ptz UI

[dbuezas]

Camera apps typically treat ptz controls slightly different than this card: movement starts on mouse down and ends on mouse up
This PR allows for callbacks for each event independently, enabling this behaviour.
It also adds support for long press, which is useful to set the home preset.

Usage example:

type: custom:webrtc-camera
url: camarablanca_dvrip
shortcuts:
  services:
    - name: Sync
      icon: mdi:clock-check
      service: icsee_ptz.synchronize_clock
      service_data:
        camera: garden
ptz:
  service: icsee_ptz.move
  data_home:
    camera: garden
    cmd: GotoPreset
    preset: 0
  data_long_home:
    camera: garden
    cmd: SetPreset
    preset: 0
  data_start_left:
    camera: garden
    cmd: DirectionLeft
    move_time: 10
  data_end_left:
    camera: garden
    cmd: DirectionLeft
    move_time: 0
  data_start_right:
    camera: garden
    cmd: DirectionRight
    move_time: 10
  data_end_right:
    camera: garden
    cmd: DirectionRight
    move_time: 0
  data_start_up:
    camera: garden
    cmd: DirectionUp
    move_time: 10
  data_end_up:
    camera: garden
    cmd: DirectionUp
    move_time: 0
  data_start_down:
    camera: garden
    cmd: DirectionDown
    move_time: 10
  data_end_down:
    camera: garden
    cmd: DirectionDown
    move_time: 0

Something similar can also be achieved with the onvif service using move_mode: ContinuousMove