Berry 'tasmota.settings' entries for PixelType

[s-hadinger]

Description:

Added:

• tasmota.settings.light_pixels_order to set RGB pixel order on Leds
• tasmota.settings.light_pixels_order: 0 = 3 channels RGB, 1 = 4 channels RGBW
• tasmota.settings.light_pixels_w_first: indicates if W channel comes first, 0 = RGBW, 1 = WRGB

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.2.7.8
• The code change is tested and works with Tasmota core ESP32 V.3.1.1.250109
• I accept the CLA.

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