clients: Add client generation

[febo]

Problem

Currently, the stake program does not include annotation to generate an IDL. This prevents using Codama to generate clients.

Solution

Use Shank to annotate the program and generate clients.

Note: Majority of source files under the clients folder are auto-generated.

[steveluscher]

[joncinque]

Just the one nit.

It doesn't need to be done in this PR, but what do you think about introducing a feature like idl and gating all shank usage on that flag?

That way, users of the crate don't have to pull in shank, and even better, it should make it easier to swap to codama macros in the future with less disruptive breakage.

[febo]

Just the one nit.

It doesn't need to be done in this PR, but what do you think about introducing a feature like idl and gating all shank usage on that flag?

That way, users of the crate don't have to pull in shank, and even better, it should make it easier to swap to codama macros in the future with less disruptive breakage.

Good point! We could add shank as an optional dependency, but theoretically we don't need to add a feature for it. The annotation is only used by shank cli, so they don't do anything during compilation.

shank = { version = "0.4.2", optional = true }

This is enough to not pull in shank. The IDL generation still works without the need for a feature. Or we could add a feature, but it won't get used.

[joncinque]

I'm not sure I see how it works without a feature (unless you mean using the implicit dep:shank feature), but I'll wait to see the code!

[febo]

I'm not sure I see how it works without a feature (unless you mean using the implicit dep:shank feature), but I'll wait to see the code!

Hmmm, you are right. The IDL generation works without having a feature, but you will need it to be able to have the validation when you add them to your struct/enum types.

I will add the idl feature.

[febo]

I'm not sure I see how it works without a feature (unless you mean using the implicit dep:shank feature), but I'll wait to see the code!

Hmmm, you are right. The IDL generation works without having a feature, but you will need it to be able to have the validation when you add them to your struct/enum types.

I will add the idl feature.

This did not work. Shank CLI does not "detect" the macros when their are behind a feature flag. I removed Shank macros and dependency but kept the IDL, so we can have the generated clients.

[joncinque]

Just the tiny nit, then this can go in!