feat: added Uniswap v2 Factory contract (and sketch of Pool)

[johnson2427]

What I did

fixes: #5 fixes: SBK-521

How I did it

How to verify it

Checklist

• [ ] Passes all linting checks (pre-commit and CI jobs)
• [ ] New test cases have been added and are passing
• [ ] Documentation has been updated
• [ ] PR title follows Conventional Commit standard (will be automatically included in the changelog)

[linear[bot]]

SBK-521 Add UniswapV2 Factory Contract