fix(data transport layer): Fix typescript type resolution

updates codeowners with round-robin review teams

fix(ctb): correct usage of legacy in ProxyAdmin

chore(ctb): update semver to 1.0.0

specs: system config unsafe block signer

fix(ctb): minor edit to XDM comment

fix(ctb): comment in SequencerFeeVault

feat(ctb): Forge invariant tests

fix(ctb): remove unnecessary ERC20 factory code

Corrects the usage of the legacy custom tag in the ProxyAdmin contract.
Legacy tags are meant for legacy functions that are included in a
contract in order to satisfy a previous ABI. The ProxyAdmin was using
legacy tags for things that have to do with legacy behavior.

Updates semver for all contracts in contracts-bedrock to 1.0.0.

fix(ctb): missing FeeVault comments

feat(ctb): remove unnecessary ERC721 factory code

Add the `unsafeBlockSigner` to the specs for the
`SystemConfig` contract. This was overlooked when
the `unsafeBlockSigner` was added to the contract itself.

Adds in an additional section explaining that the gas burn
helps with sybil resistance, to prevent network spam on L2.
It was not clear that this was the case when reading the doc.
Also clean up the pseudocode.

Fixes an incomplete comment in the SequencerFeeVault that was missing a
return.

gas snapshot

feat(ctb): receivedMessages => failedMessages