Switch to Foundry for testing

[will-holley]

• Intro to foundry: https://www.paradigm.xyz/2021/12/introducing-the-foundry-ethereum-development-toolbox
• Motivation: simplify tests by moving them closer to the modules & reduce the surface area for errors created by the testing framework (i.e. JS, Ethers, Hardhat)

Tests

• Wrapper

Modules

• Beneficiary
• Lease
• Remittance
• Taxation
• Valuation