las3_pub / predictable_parallel_patterns

This requires the user to explicitly manage the storage duration/place of the thread local state, making a fine grained memory allocation simpler.

We force linker errors if the new operator is used somewhere. See NOTES.md for details.

Seperate library from other parts of project (samples, playground, testing, ...). We still are in one 'toplevel' cmake project, so we can for exmaple compile everything (library and playground) in debug mode, for simple development.