add Ili9341 display (#1233)

* setup ili9341 framework
used epaper-waveshare as start

* first version working

* added models for now only M5Stack

* get_buffer_length is huge

* fill, low/high watermark, buffer tests failed.
RAM is to small for ili9341 16 bit color mode

* removed high/low watermark debug log

* added standard 2.4" TFT model

* code cleanup

* make ledpin optional
busy pin is not needed

* make bufer 1 byte to avoid the
buffer allocation error

* gitignore

* added backlight pin to dump_config

* huge speed increase
8bit color framebuffer (256 colors)
lo and high watermark for drawing to screen

* fix for images

* higher spi data rates

* Set spi data rate to 40Mhz Experimental

* fixed: formatting
fixed: the last row and column being trimmed
fixed: namings

* Update the code to use Color class

* fixed minor color things

* fixed linting

* #patch minor fixes

* fix gitignore too

* Update esphome/components/ili9341/ili9341_display.cpp

Co-authored-by: Oleg <epushiron+github@gmail.com>

* reverting the changes as it's being fixed in PR-1241

Co-authored-by: Michiel van Turnhout <qris.online@gmail.com>
Co-authored-by: Michiel van Turnhout <m.vanturnhout@exxellence.nl>
Co-authored-by: Oleg <epushiron+github@gmail.com>

esphome/components/spi/spi.h

@@ -55,6 +55,8 @@ enum SPIDataRate : uint32_t {
   DATA_RATE_2MHZ = 2000000,
   DATA_RATE_4MHZ = 4000000,
   DATA_RATE_8MHZ = 8000000,
+  DATA_RATE_20MHZ = 20000000,
+  DATA_RATE_40MHZ = 40000000,
 };
 
 class SPIComponent : public Component {