feat: use updated zksync-contracts for foundry support

[coffeexcoin]

PR-Codex overview

This PR primarily updates import paths in various Solidity files to align with a new directory structure and updates dependency versions in package.json and package-lock.json.

Detailed summary

• Updated import paths from @matterlabs/zksync-contracts/l2/system-contracts/... to @matterlabs/zksync-contracts/contracts/system-contracts/... in multiple files.
• Added new directories to .gitignore: out/ and zkout/.
• Updated @matterlabs/zksync-contracts version to 1.0.0-alpha.9.
• Updated @matterlabs/hardhat-zksync and @matterlabs/hardhat-zksync-verify versions.
• Added a CI workflow in .github/workflows/foundry-build.yml.
• Updated foundry.toml with new configurations and paths.
• Updated Transaction and IPaymasterFlow imports in several contract files.

The following files were skipped due to too many changes: package-lock.json

✨ Ask PR-Codex anything about this PR by commenting with /codex {your question}