Expand lcd/i80_controller example to support ILI9341 display (IDFGH-7775)

[PaintYourDragon]

This replaces #9266 (closed yesterday as the wrong approach). i80 LCD example is extended to show ILI9341 usage; nearly but not quite the same as ST7789, requires no driver changes, just user code. If nothing else, the addition of .flags.swap_color_bytes being the reverse of the corresponding LvGL setting might be worth keeping.
Tested on ESP32-S3-DevKitC-1 N8R8 with Adafruit ILI9341 breakout (8-bit parallel interface).

[suda-morris]

Nice job @PaintYourDragon I like this solution! Thank you for your contribution!

[PaintYourDragon]

Changes made as requested. Thank you for looking!
Deleted both set_gap lines that were 0,0 rather than leave them in; ONLY the ST7789 sets a gap. Confirmed the gap defaults are always 0; this is implicit as the panel_t structure is calloc’d (which sets allocated memory to 0).

[suda-morris]

sha=148ce09d97a46602f58791d67db37bfd0f20b751