[ADD] pos_six: Six payment terminals with TIM

Deprecate MPD integration for Six payment terminals and replace it
with TIM because:
- MPD broadcasts connection messages to the network so having
  multiple terminals and MPD servers in the same network results
  in connection issues
- TIM has a JS SDK so it doesn't require an IoT Box.
- MPD supports only Yomani and Yoximo terminals while TIM also
  supports Ingenico.

closes odoo/odoo#46182

Taskid: 2188566
Related: odoo/enterprise#8813
Signed-off-by: pimodoo <pimodoo@users.noreply.github.com>