I'd like to make a few clarifications if you don't mind!

You can define your own file types with ripgrep on the command line (albeit not in a config file, so you end up needing a wrapper script or an alias).

ripgrep has pre-compiled binaries that work out of the box on Windows, Mac and Linux.

"Rust runtime" isn't really a thing. It's like you saying you don't want to deal with a C runtime.