feat(carbon-template): add dark mode

[Robert27]

• added css overrides support dark mode docs
• syncs with the device settings

Here's our demo version using the overrides deployed: https://api.dev.neuland.app/neuland-api

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 84.05%. Comparing base (f7bb3bd) to head (e3bc1fd).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #423   +/-   ##
=======================================
  Coverage   84.05%   84.05%           
=======================================
  Files          93       93           
  Lines        2910     2910           
  Branches      570      596   +26     
=======================================
  Hits         2446     2446           
+ Misses        419      417    -2     
- Partials       45       47    +2     

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[pelletier197]

Hey! Sorry for the late review. This is an awesome improvement. Tested it and everything works well.

Thanks a lot for that!