nim-lang/nim ? reverse-engineered prompt

I want this repo set up so I can build Nim from source and actually use it afterward. Please wire up whatever is needed to bootstrap the compiler from the older C sources, then build the current development version, the standard library, and the included tools and docs using the normal scripts for the platform. When it’s done, I should have a working bin folder I can add to my PATH and be able to run the Nim compiler and the project’s build tool.

Please also make sure the basic test flow works, ideally by running at least a reasonable subset first and then the full test command if everything looks good. If there are platform specific gotchas for Windows, Mac, or Linux, handle them in the cleanest way the project expects rather than inventing a custom setup. Keep changes minimal and aligned with how this repo already works. If anything is unclear, look up the current Nim build docs online and follow the official path.