feat: add AccessControlEnumerable extension (#622)

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### Add AccessControlEnumerable Extension

- Introduced `enumerable` module for enhanced access control
functionality that allows enumerating members of each role
- Implemented OpenZeppelin's AccessControlEnumerable pattern in
Rust/Stylus
- Updated public exports to include new access control components

<!-- Fill in with issue number -->
Resolves #361 

#### PR Checklist

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- [x] Tests
- [x] Documentation
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---------

Co-authored-by: Daniel Bigos <[email protected]>
Co-authored-by: Daniel Bigos <[email protected]>
Co-authored-by: Daniel Bigos <[email protected]>
Co-authored-by: Nenad <[email protected]>
Co-authored-by: Nenad <[email protected]>

Author: 3 people

CHANGELOG.md

@@ -9,6 +9,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Added
 
+- Add `AccessControlEnumerable` extension that supports role member enumeration. #622
+- Add `EnumerableAddressSet`. #622
+
 ### Changed
 
 - Bump `cargo-stylus` to `v0.6.0`. #683