feat: add initial l1-contracts-foundry

[aon]

What ❔

• This PR aims to begin the transition to move away from hardhat into foundry
• Adds an initial move for l1-contracts into a specific foundry folder

Why ❔

• To move from hardhat into foundry

Checklist

• PR title corresponds to the body of PR (we generate changelog entries from PRs).
• Tests for the changes have been added / updated.
• Documentation comments have been added / updated.

Notes

There are some points of discussion I wanted to address before finalizing this PR.

Preprocessing support

#273 removes the need for preprocessing.

[StanislavBreadless]

@Deniallugo I think we can discuss it later (since it is a rather small change to the PR and it is already somewhat big), but overall we should set the governance to the address rightaway (or at least as soon as possible). For localhost scripts it does not matter, but for the mainnet deployments we should have as little risk of human error as possible (i.e. the error when someone forgets to look onto the etherscan to double check that the governance was set correctly).

[StanislavBreadless]

If I undertand correctly this one is only needed for tests and does not need to be always called

[aon]

I believe the approach we took with @Deniallugo for this script was to assume nothing was deployed previously. Therefore we're deploying it here. If necessary an option could be added to the config to pass the address manually. If it's present, then we don't deploy the DiamondProxy, otherwise we deploy it. Do you think this might work?