Support for chip from espressif family with Zephyr

Nobody has claimed this yet.

Is it possible to use this module on an ESP chip (I'm trying to use it on ESP32)?
I'm able to build 'micro_ros_zephyr_module' using 'west build -b disco_l475_iot1' but I'm having errors caused by 'app.overlay' content when building with 'west build -p auto -b esp32_devkitc_wroom':

```
-- west build: generating a build systemwroom
Loading Zephyr default modules (Zephyr base).
-- Application: /home/ognjen/zephyrproject/applications/micRobbit-firmware/app/modules/micro_ros_zephyr_module
-- CMake version: 3.22.1
-- Found Python3: /usr/bin/python3 (found suitable version "3.10.12", minimum required is "3.8") found components: Interpreter
-- Cache files will be written to: /home/ognjen/.cache/zephyr
-- Zephyr version: 3.5.99 (/home/ognjen/zephyrproject/zephyr)
-- Found west (found suitable version "1.2.0", minimum required is "0.14.0")
-- Board: esp32_devkitc_wroom
-- ZEPHYR_TOOLCHAIN_VARIANT not set, trying to locate Zephyr SDK
-- Found host-tools: zephyr 0.16.3 (/opt/zephyr-sdk-0.16.3)
-- Found toolchain: zephyr 0.16.3 (/opt/zephyr-sdk-0.16.3)
-- Found Dtc: /opt/zephyr-sdk-0.16.3/sysroots/x86_64-pokysdk-linux/usr/bin/dtc (found suitable version "1.6.0", minimum required is "1.4.6")
-- Found BOARD.dts: /home/ognjen/zephyrproject/zephyr/boards/xtensa/esp32_devkitc_wroom/esp32_devkitc_wroom.dts
-- Found devicetree overlay: /home/ognjen/zephyrproject/applications/micRobbit-firmware/app/modules/micro_ros_zephyr_module/app.overlay
devicetree error: /home/ognjen/zephyrproject/applications/micRobbit-firmware/app/modules/micro_ros_zephyr_module/app.overlay:2 (column 14): parse error: undefined node label 'usbotg_fs'
-- In: /home/ognjen/zephyrproject/applications/micRobbit-firmware/app/modules/micro_ros_zephyr_module/build/zephyr, command: /usr/bin/python3;/home/ognjen/zephyrproject/zephyr/scripts/dts/gen_defines.py;--dts;/home/ognjen/zephyrproject/applications/micRobbit-firmware/app/modules/micro_ros_zephyr_module/build/zephyr/zephyr.dts.pre;--dtc-flags;'';--bindings-dirs;/home/ognjen/zephyrproject/zephyr/dts/bindings;--header-out;/home/ognjen/zephyrproject/applications/micRobbit-firmware/app/modules/micro_ros_zephyr_module/build/zephyr/include/generated/devicetree_generated.h.new;--dts-out;/home/ognjen/zephyrproject/applications/micRobbit-firmware/app/modules/micro_ros_zephyr_module/build/zephyr/zephyr.dts.new;--edt-pickle-out;/home/ognjen/zephyrproject/applications/micRobbit-firmware/app/modules/micro_ros_zephyr_module/build/zephyr/edt.pickle;--vendor-prefixes;/home/ognjen/zephyrproject/zephyr/dts/bindings/vendor-prefixes.txt
CMake Error at /home/ognjen/zephyrproject/zephyr/cmake/modules/dts.cmake:268 (message):
gen_defines.py failed with return code: 1
Call Stack (most recent call first):
/home/ognjen/zephyrproject/zephyr/cmake/modules/zephyr_default.cmake:129 (include)
/home/ognjen/zephyrproject/zephyr/share/zephyr-package/cmake/ZephyrConfig.cmake:66 (include)
/home/ognjen/zephyrproject/zephyr/share/zephyr-package/cmake/ZephyrConfig.cmake:92 (include_boilerplate)
CMakeLists.txt:7 (find_package)

-- Configuring incomplete, errors occurred!
FATAL ERROR: command exited with status 1: /usr/bin/cmake -DWEST_PYTHON=/usr/bin/python3 -B/home/ognjen/zephyrproject/applications/micRobbit-firmware/app/modules/micro_ros_zephyr_module/build -GNinja -DBOARD=esp32_devkitc_wroom -S/home/ognjen/zephyrproject/applications/micRobbit-firmware/app/modules/micro_ros_zephyr_module
```

I found in this issue statement that this module should be usable on any board supported by Zephyr.

https://github.com/micro-ROS/micro_ros_zephyr_module/issues/60#issuecomment-1141161320

Thanks in advance.

Start with app.overlay and the west build command for esp32_devkitc_wroom; the reported failure is the undefined usbotg_fs node label during devicetree generation. Compare this with the disco_l475_iot1 build and determine what board-specific changes are needed for ESP support. Done means the module builds successfully for the ESP32 board without the devicetree error.

Written by the indexing model from the issue text.