Merge branch 'feature/doc_boards_and_modules' into 'master'

doc: add dev module and boards by Espressif

Overview, picture, link to schematic, ref. design, etc. for the following development module and boards:

- ESP-WROOM-32
- ESP32 Core Board V2 / ESP32 DevKitC
- ESP32 Demo Board V2
- ESP32 WROVER KIT V1 / ESP32 DevKitJ V1
- ESP32 WROVER KIT V2

See merge request !560

diff --cc docs/index.rst
Simple merge