RinatNamazov/RIMG — reverse-engineered prompt

Build me a small GTA San Andreas modding tool that uses encrypted IMG archives. I want two parts. First, a simple desktop command line app where I can point it at an input file or folder and have it pack things into an IMG archive, with an optional output path if I want to choose the filename. Second, a game plugin I can drop into the SA game folder as an ASI so the game can read files from those encrypted archives at runtime, and if needed also handle decompression.

Please make it feel like a working example project, not just a stub. Keep the usage straightforward, something like passing an input path and optionally an output path. Add whatever is needed so it builds cleanly and is easy to test. If there are performance limits because the encryption is heavy, mention that clearly so people know it may lower FPS. Include a short README with install and usage steps. Look up current docs online if you need to.