Feature Request: Add Support for RISC-V (riscv64) Architecture

With the rise of alternative CPU architectures following Apple's M series chips, RISC-V has gained significant traction.

I am currently using a Milk-V Duo S, which is based on the RISC-V architecture:

When attempting to use curl on this device (which runs BusyBox), I noticed that riscv64 is not currently supported.

Would it be possible to add support for this architecture? If this is not something that can be added directly, I would be happy to contribute, but I would appreciate any guidance on where to make the necessary updates. I am not very familiar with Rust, so any pointers on where to start would be helpful.

Thank you!