It corrupts environment on macOS runner because it uses shell, not docker-executor,
and makes all tree read-only for a non-root user.
+ Replace examples with real files in example README.md
This updates the minimal supported version of CMake to 3.16, which in turn enables us to use more CMake features and have a cleaner build system.
This is the version that provides most new features and also the one we use in our latest docker image for CI.
This example shows how to use ESP-IDF build system features to build
multiple configurations of an app from the same source files.
Configurations are set by overriding SDKCONFIG_DEFAULTS variable when
invoking idf.py.
Related: https://github.com/espressif/esp-idf/issues/5658
