These programs are enumerated the same as the other smart contract subdirectories (e.g. solana).
Read the design documents for each example project:
Install Foundry tools, which include forge, anvil and cast CLI tools.
Simply run make to install the necessary dependencies and build with forge, which runs the test simultaneously.
Run the Solidity-based unit tests with make unit-test and the local-validator integration tests via make integration-test, or simply make test to run both of them.
The repo can either be run on a local testnet with Anvil or deployed on Ethereum mainnet + testnet with Forge.
To avoid the overhead of setting up rpc and wallets, use Remix IDE.