chore: L1 deploy script

[horsefacts]

Motivation

Add an L1 deploy script to deploy the FnameResolver on Ethereum mainnet.

Change Summary

Split deploy scripts into DeployL2 and DeployL1 scripts. Add separate L1_MAINNET_RPC_URL and L2_MAINNET_RPC_URL environment variables. Remove TESTNET_RPC_URL (it's unused).

Merge Checklist

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• The PR title adheres to the conventional commits standard
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PR-Codex overview

This PR focuses on updating the RPC endpoints and deployment scripts.

Detailed summary

• Updated RPC endpoints in foundry.toml and .env.example
• Updated RPC endpoints in .github/workflows/ci.yml
• Updated RPC endpoints in docker-compose.yml
• Updated function modifier in FnameResolverTestSuite.sol
• Updated function visibility in FnameResolver.sol
• Renamed Deploy contract to DeployL2 in script/Deploy.s.sol
• Renamed DeployTest contract to DeployL2Test in test/Deploy/Deploy.t.sol
• Added new DeployL1 contract in script/DeployL1.s.sol
• Added new DeployL1Test contract in test/Deploy/DeployL1.t.sol

The following files were skipped due to too many changes: test/Deploy/Deploy.t.sol

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[github-actions]

Coverage after merging horsefacts/l1-deploy-script into main will be

98.99%

Coverage Report

File	Stmts	Branches	Funcs	Lines	Uncovered Lines
src
Bundler.sol	100%	100%	100%	100%
FnameResolver.sol	100%	100%	100%	100%
IdRegistry.sol	100%	100%	100%	100%
KeyRegistry.sol	100%	100%	100%	100%
StorageRegistry.sol	100%	100%	100%	100%
src/lib
Signatures.sol	100%	100%	100%	100%
TransferHelper.sol	0%	0%	0%	0%	12, 17, 20, 20, 20
TrustedCaller.sol	100%	100%	100%	100%
src/validators
SignedKeyRequestValidator.sol	100%	100%	100%	100%