add support for WS2811 timing (IEC-194)

[sterisa]

Change description

Within the led_strips component:
Added a new led model in led_strip_types
Added the corresponding timing in led_strip_rmt_encoder (I had to move reset_ticks definition up to be able to edit it for WS2811

Source: https://cdn-shop.adafruit.com/datasheets/WS2811.pdf
or https://www.alldatasheet.com/datasheet-pdf/view/1132633/WORLDSEMI/WS2811.html

I tested on a WS2811 50 led strip
Note WS2811 is RGB, not GRB. I will put that change in later

[CLAassistant]

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[suda-morris]

@sterisa Thanks for your contribution. This PR proposed a new way to set the pixel order in the user code, I think it can also help with your WS2811: #344

[sterisa]

@sterisa Thanks for your contribution. This PR proposed a new way to set the pixel order in the user code, I think it can also help with your WS2811: #344

A little overkill, but I am fine whatever you decide. My WS2811 timing changes are pretty small and independent of the RGB vs GRB handling. Should I revert my RGB changes?