feat(hw_cdc): create cmake config file

Adds necessary CMakeLists.txt file to the project with the HW CDC defines that will enable it.

Author: SuGlider

idf_component_examples/hw_cdc_hello_world/CMakeLists.txt

@@ -0,0 +1,12 @@
+# For more information about build system see
+# https://docs.espressif.com/projects/esp-idf/en/latest/api-guides/build-system.html
+# The following five lines of boilerplate have to be in your project's
+# CMakeLists in this exact order for cmake to work correctly
+cmake_minimum_required(VERSION 3.16)
+include($ENV{IDF_PATH}/tools/cmake/project.cmake)
+
+# Adds necessary definitions for compiling it using Serial symbol attached to the HW USB CDC port
+list(APPEND compile_definitions "ARDUINO_USB_CDC_ON_BOOT=1")
+list(APPEND compile_definitions "ARDUINO_USB_MODE=1")
+
+project(hw_cdc_hello_world)