[ccache] you can enable locally

[dimitre]

ccache is now enabled in most actions (all linux, macos make and msys2 actions)
to enable locally you can just install ccache and add an environment variable.
here in macOS I've enabled

brew install ccache

editing ~/.zprofile

export ccache="ccache"

You have to restart terminal so the variables take effect
if everything is correct you will see one more line in make process like this:

💿 Using CCACHE - Compile.core.mk