Introduce the problem

Our current ESP32 docs are quite outdated and shall be updated

Proposal

I think we shall remove the current content and add these sections:

• Overview:
  • general introduction abut Espressif/ESP32
  • Overview of the models highlighting the GUI related capabilities
• Get started in ESP-IDF
  • What is it?
  • Install ESP-IDF: link to the official guide
• ESP-BSP
  • What is it? Basic structure?
  • How to try out a ready to use esp-bsp project? How to choose an other demo?
  • How to create a custom project?
    • esp_lvgl_port from esp-bsp
      • What is it?
      • How to use it? Link to examples.
    • How to add a custom driver?
      • Why? How? Generic info about using SPI, etc
• Mentioned other frameworks if relevant: Arduino, PlatformIO, Zephyr, NuttX,etc
• Optimize speed
  • What to configure to make LVGL faster
• Notes: Generic good to know notes
  • E.g. how to use LVGL master as anon-managed component