Decouple Foundry build and project format from JS Solidity test runner

[agostbiro]

Problem

The JS Solidity test runner executes bytecode compiled with Hardhat, but it still depends on the Foundry project format (file layout, config) and build system to provide the following functionality (possibly incomplete):

• In-line test configuration
• Regulate file system access
• Managing dependencies
• Remapping dependencies
• Link contracts
• vm. getDeployedCode

Definition of Done

The Foundry build and project format is decoupled from JS Solidity test runner. TBD what functionality to preserve