Add PrecompilesFeatureSet

[jstarry]

Problem

The SDK shouldn't need to be coupled to specific feature keys to enable feature gated functionality in the SDK.

Summary

Breaking change to precompile interface to enable feature gates via flags so that the SDK doesn't need to be aware of or coupled to feature keys. This requires a major version bump of the precompiles and transaction crate according to semvar rules

• Update the Precompile struct to have an enable function. Really this should have all be based on traits :/

[jstarry]

This can wait until after the agave feature set migration is finished if y'all want but I think this will be a good change regardless because we shouldn't have a dependency on agave crates from the sdk if we can help it.

[joncinque]

This approach certainly works!

As another option, I'd like to point out #86, which uses solana-feature-set-interface::FeatureSet, but requires redefining the feature sets within the crates that need them.

If agave-feature-set::FeatureSet adds a function to expose the underlying solana-feature-set-interface::FeatureSet, then there should be a lot less friction in integration.

The big drawback with the other approach is redefining the feature ids, which isn't an amazing solution.

[jstarry]

The big drawback with the other approach is redefining the feature ids, which isn't an amazing solution.

Yeah if it weren't for the feature ids I would definitely prefer just switching the feature set interface. Coupling sdk releases to feature id's in agave is far from ideal and likely to cause a lot of headaches and potentially serious bugs.

I think there are other solutions besides this approach. @t-nelson had some ideas as well to have some sort of generic LocalFeatures struct but I wasn't super clear on that.

[jstarry]

@t-nelson suggested a better approach.. just migrate agave from using solana-precompiles to agave-precompiles and deprecate any usage of solana-precompiles in the sdk. Precompile errors stay for now tho

[jstarry]

I'll likely re-introduce this change in agave, it helps make ix iteration faster by doing less feature set lookups