Add support for cargo binstall

[yodatak]

Hello i would love to have a simple way to install rga with cargo binstall without need to compile form source

We need to have some info to cargo.toml to permit this

Like this
https://github.com/typst/typst/pull/4458/files

[yodatak]

I do a PR i hope it works

#236

[yodatak]

Some documentation
https://github.com/cargo-bins/cargo-binstall/blob/main/SUPPORT.md