feat(cli): add AST validation and virtual storage layout - #385

Summary

Introduces AST-based CLI validation and Virtual Storage Layout support for Compose projects.

Changes Made

• Added Solidity AST compilation and parsing through Foundry and Hardhat.
• Added Virtual Storage Layout generation and collision detection.
• Added the compose validate pipeline and integrated validation into compose init.
• Added unit and integration tests for AST generation, storage layouts, and validation pipelines.

Checklist

Before submitting this PR, please ensure:

• Code follows the Solidity feature ban - No inheritance, constructors, modifiers, public/private variables, external library functions, using for directives, or selfdestruct

• Code follows Design Principles - Readable, uses diamond storage, favors composition over inheritance

• Code matches the codebase style - Consistent formatting, documentation, and patterns (e.g. ERC20Facet.sol)

• Code is formatted with forge fmt

• Existing tests pass - Run tests to be sure existing tests pass.

• New tests are optional - If you don't provide tests for new functionality or changes then please create a new issue so this can be assigned to someone.

• All tests pass - Run forge test and ensure everything works

• Documentation updated - If applicable, update relevant documentation

• Changesets — If this PR changes publishable packages (src/, cli/), changeset-bot will comment if a release note might be needed. You can add one when convenient or defer to maintainers.

Make sure to follow the contributing guidelines.

Additional Notes

• Selector export differences are reported as warnings; selector and storage collisions remain blocking errors.
• Foundry and Hardhat integration tests compile a minimal Solidity fixture and compare the generated AST against canonical expected output.