pitchfork VS cmake_conan_boilerplate_template

Just use cmake-init which sets you up with a variation of the pitchfork layout.

Link broken, should be https://github.com/vector-of-bool/pitchfork

I use a variation of thispitchfork github layout. I have found it a very useful structure for my projects. As for file names, I always have only one class per file with the file name matching the class name exactly.

Take a look at the pitchfork standard - a lot of projects follow this convention today: https://github.com/vector-of-bool/pitchfork

Consider using the pitchfork layout convention

This is what I was directed to in regards to this question and what I use to organise structure. I was told it's a good starting point so not sure if there is something better out there. https://github.com/vector-of-bool/pitchfork

A while ago I stumbled upon this pitchfork project layout, But for simple projects I have just one CMakefile with the few sources in one project inside. If this grows, I use this and put it in a subfolder of the new project and add_subdirectory it...

You could use a repository template, like this one is from Jason Turner and used Conan for dependencies. Covers lots of testing and release mechanics in CI that you can adopt to generate binaries for your releases.