Add #[abi_name(name = "foo")] attribute to rename ABI items.

[tritao]

Description

Add #[abi_name(name = "foo")] attribute to rename enum and struct ABI items.

Here is example of how it can be used:

contract;

#[abi_name(name = "RenamedMyStruct")]
struct MyStruct {}

#[abi_name(name = "RenamedMyEnum")]
enum MyEnum {
  A: ()
}

abi MyAbi {
    fn my_struct() -> MyStruct;
    fn my_enum() -> MyEnum;
}

impl MyAbi for Contract {
  fn my_struct() -> MyStruct { MyStruct{} }
  fn my_enum() -> MyEnum { MyEnum::A }
}

Closes #5955.

Checklist

• I have linked to any relevant issues.
• I have commented my code, particularly in hard-to-understand areas.
• I have updated the documentation where relevant (API docs, the reference, and the Sway book).
  • If my change requires substantial documentation changes, I have requested support from the DevRel team
• I have added tests that prove my fix is effective or that my feature works.
• I have added (or requested a maintainer to add) the necessary Breaking* or New Feature labels where relevant.
• I have done my best to ensure that my PR adheres to the Fuel Labs Code Review Standards.
• I have requested a review from the relevant team or maintainers.

[codspeed-hq]

CodSpeed Performance Report

Merging #7057 will not alter performance

_{Comparing tritao:annotation-abi-name (a5e0532) with master (ddec15a)}

Summary

✅ 22 untouched benchmarks

[ironcev]

The attribute should be added to the Attributes chapter in the documentation.

I've changed that documentation page fully in #7058 because it was seriously outdated. So, whoever gets the PR merged later will have some slight merge conflicts to solve on that page 😄