Matter support for split lights (SetOption68 1 and SetOption37 128)

[s-hadinger]

Description:

Matter support for new split light modes:

RGB and White Split

See RGB and White Split enabled with SetOption37 128.

4 channels lights are split as 1 RGB and 1 Dimmer:

5 channels light are split as 1 RGB and 1 CT:

Independent PWM Channels

See Independent PWM Channels enabled with SetOption68 1

All channels are defined as independant Light Dimmers:

Note: the first Dimmer has no parameter and is mapped to the default (first) channel. Other channels need an additional light parameter to map to the appropriate channel (numbering starts with 1 which is also the default).

Checklist:

• The pull request is done against the latest development branch
• Only relevant files were touched
• Only one feature/fix was added per PR and the code change compiles without warnings
• The code change is tested and works with Tasmota core ESP8266 V.2.7.7
• The code change is tested and works with Tasmota core ESP32 V.3.0.2
• I accept the CLA.

NOTE: The code change must pass CI tests. Your PR cannot be merged unless tests pass