linux compilation and README

[lludol]

Hello,

I like your project and will do some tests with it when I have more time, but please update the "installation" in your readme.
On Linux (and I guess Windows), we need to run :

1. cargo build --release -p perry
2. cargo build --release -p perry-runtime

If I run only cargo build --release, then I have this error:
error: `objc2` only works on Apple platforms. Pass `--target aarch64-apple-darwin` or similar to compile for macOS. (If you're absolutely certain that you're using GNUStep, you can specify that with the `gnustep-x-y` Cargo feature instead).

Which is normal objc2 is only available on MacOS...
But if I understand well, only people using MacOS can help improve this project?

I don´t know if it's in your roadmap, but it would be easier if you could provide an install script (like the one for bun ; and have the upgrade feature too) or make perry available via global npm.

Also, while I am here, the links in Ecosystem are broken!

[lludol]

I don't know much about Rust, but I found out that we can just run this on Linux:
cargo build --release --locked (no need to run the two commands like I put in the first message)

[proggeramlug]

thanks @lludol for bringing this up! I've just commited a few fixes here. Linux problem confirmed and fixed as well as the broken links.

Should be all good now!