Feature/add cmake toolchain examples local flow

[lasote]

Related https://github.com/conan-io/docs/pull/2524

[czoido]

We can merge these two before this one:

• https://github.com/conan-io/examples2/pull/14 that extracts some tools
• https://github.com/conan-io/examples2/pull/16 that sets CMake 3.23 as default for Mac/Win

[lasote]

Converted to draft till we relocate them.