feat(go): creating remote package for reusable bindings

[asteurer]

Overview

This closes #1484

Usage

Since the Go package hasn't yet been set up, you can try the new functionality by replacing the following line in the generated wit_component go.mod file:

module wit_component

go 1.25

- replace github.com/bytecodealliance/wit-bindgen => github.com/bytecodealliance/wit-bindgen/crates/go/src/package v0.50.0
+ replace github.com/bytecodealliance/wit-bindgen => github.com/asteurer/wit-bindgen/crates/go/src/package v0.50.0

@dicej

[dicej]

Thanks for doing this! LGTM overall; just a few comments inline.

[dicej]

@asteurer When I run the tests locally and then run git diff, I see:

diff --git a/wit_component/go.mod b/wit_component/go.mod
index 1376492c..dd0a084c 100644
--- a/wit_component/go.mod
+++ b/wit_component/go.mod
@@ -2,4 +2,4 @@ module wit_component

 go 1.25

-replace github.com/bytecodealliance/wit-bindgen => /home/asteurer/repos/wit-bindgen/crates/go/src/package
+replace github.com/bytecodealliance/wit-bindgen => /home/dicej/p/wit-bindgen/crates/go/src/package

Is there a way we could avoid putting local paths in a file tracked by Git?

[asteurer]

@dicej 🤦 That's an artifact from the runtime test that snuck in. I'll remove that real quick

[dicej]

@alexcrichton any concerns about the new CI step (or any other aspect of this PR)?

[alexcrichton]

Looks good to me!