Port project to use cmake build system.

This permits to develop the project more easily and efficiently than with Arduino iIDE (which is a pain)
Use the latest IDF framework version
Compile for esp32C5 chip

CMakeLists.txt

@@ -0,0 +1,36 @@
+# 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(FetchContent)
+include($ENV{IDF_PATH}/tools/cmake/project.cmake)
+
+idf_build_set_property(MINIMAL_BUILD ON)
+
+FetchContent_Declare(
+  c1101_driver
+  GIT_REPOSITORY https://github.com/Viproz/SmartRC-CC1101-Driver-Lib.git
+  GIT_TAG        3664897200d1d695fbc78f7ae5d731cb2acff8be
+)
+
+FetchContent_MakeAvailable(c1101_driver)
+
+
+FetchContent_Declare(
+  pubsubclient
+  GIT_REPOSITORY https://github.com/knolleary/pubsubclient.git
+  GIT_TAG        2d228f2f862a95846c65a8518c79f48dfc8f188c
+)
+
+FetchContent_MakeAvailable(pubsubclient)
+
+FetchContent_Declare(
+  arduinoWebSockets
+  GIT_REPOSITORY https://github.com/Links2004/arduinoWebSockets.git
+  GIT_TAG        8d0744eb5e916ec646d83bd1ffed5f643aab04d8
+)
+FetchContent_MakeAvailable(arduinoWebSockets)
+
+
+project(main)