primllang/pc ? reverse-engineered prompt

Build me a working compiler and command line tool for a new programming language called Priml.

I want it to feel simple and clean, with a flow like this, creating a new app or library unit, building it, running it, and cleaning it up. The tool should understand a unit yaml file with the unit name, type, version, edition, source files, dependencies, and optional C++ extensions. Please make the project buildable from source, with clear scripts for Windows and Linux, and include a few sample Priml programs so I can see how the language is supposed to look and work.

Priml should be a systems and AI focused language, so keep the implementation in C++ and make the compiler structure easy to extend. If anything is unclear, look up current docs online if you need to, and make the README and basic usage instructions friendly for someone trying it for the first time.