fix(core): allow null mapping

[xaviml]

• Fix: Allow running configuration with null actions.
• Docs: Device pages - show events with no actions assigned.

[github-actions]

🚀 Deployed on https://63b1ef6907bec9416ed35357--controllerx.netlify.app

[codecov]

Codecov Report

Base: 96% // Head: 96% // No change to project coverage 👍

Coverage data is based on head (45f59d3) compared to base (ab32230).
Patch coverage: 100% of modified lines in pull request are covered.

Additional details and impacted files

@@         Coverage Diff         @@
##           main   #662   +/-   ##
===================================
  Coverage    96%    96%           
===================================
  Files        65     65           
  Lines      2613   2613           
===================================
  Hits       2507   2507           
  Misses      106    106           

Impacted Files	Coverage Δ
apps/controllerx/cx_devices/adeo.py	100% <ø> (ø)
apps/controllerx/cx_devices/aqara.py	93% <ø> (ø)
apps/controllerx/cx_devices/homematic.py	100% <ø> (ø)
apps/controllerx/cx_devices/muller_licht.py	100% <ø> (ø)
apps/controllerx/cx_devices/osram.py	90% <ø> (ø)
apps/controllerx/cx_devices/philips.py	96% <ø> (ø)
apps/controllerx/cx_devices/rgb_genie.py	100% <ø> (ø)
apps/controllerx/cx_devices/tasmota.py	100% <ø> (ø)
apps/controllerx/cx_const.py	100% <100%> (ø)
apps/controllerx/cx_core/controller.py	95% <100%> (ø)

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