feat(registration): Add Chain registrar contract (#1064)

[Deniallugo]

What ❔

Why ❔

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.

[github-actions]

Coverage after merging deniallugo-chain-registrar into release-v25-protocol-defense will be

86.19%

Coverage Report

File	Stmts	Branches	Funcs	Lines	Uncovered Lines
contracts/bridge
L1ERC20Bridge.sol	81.82%	80%	75%	83.87%	62, 70, 70–71, 73–74
L1SharedBridge.sol	79.59%	66.23%	84.21%	83.41%	101–102, 109–110, 117–118, 125, 125–126, 133, 177, 190–191, 199–200, 212–213, 215–216, 227, 227, 227–231, 231–232, 234, 239–241, 241–242, 244–246, 246–247, 249, 261, 270, 270–271, 279–280, 290, 444–445, 447–448, 579–580, 596–597, 607–608, 623–624, 720–721, 962, 967
contracts/bridgehub
Bridgehub.sol	89.29%	74.07%	100%	91.49%	100–101, 112–113, 132–133, 155–156, 158–159, 332–333, 49, 63–64
contracts/chain-registrar
ChainRegistrar.sol	62.50%	50%	40%	68.97%	103, 112–114, 154–155, 182–183, 191–192, 199–200
contracts/common
ReentrancyGuard.sol	90%	66.67%	100%	92.86%	78–79
contracts/common/libraries
L2ContractHelper.sol	42.86%	0%	50%	52.63%	25–26, 31–32, 35–36, 50, 52, 52–53, 57, 57–58, 66
SemVer.sol	100%	100%	100%	100%
UncheckedMath.sol	100%	100%	100%	100%
UnsafeBytes.sol	100%	100%	100%	100%
contracts/governance
ChainAdmin.sol	0%	0%	0%	0%	27, 27–28, 30, 32–33, 39–40, 47–48, 56, 56–57, 60, 62–63, 63, 66, 69, 78, 78–79, 81
Governance.sol	91.67%	94.74%	95%	89.86%	44, 44–45, 48, 50–51, 53–54
contracts/state-transition
StateTransitionManager.sol	59.48%	35.71%	50%	65.42%	101, 106–110, 116, 149–150, 152–153, 155–156, 158–159, 201, 203–204, 209, 211, 211–212, 215–217, 219–220, 255, 275, 289, 294, 299, 304, 309, 314, 319, 386, 386–387, 390, 455–456, 79, 92, 92–93
TestnetVerifier.sol	44.44%	33.33%	50%	50%	16, 16, 16, 32
ValidatorTimelock.sol	95.89%	83.33%	100%	95.83%	241, 82–83
Verifier.sol	89.88%	35.71%	96.30%	90.93%	1673–1674, 287–302, 305–308, 311–318, 321–328, 331–332, 335–336, 339, 384–385, 395–396, 406–407, 417–418, 428–429, 444–445, 454, 454–455, 904–905
contracts/state-transition/chain-deps
DiamondInit.sol	77.55%	45.45%	100%	86.11%	34–35, 37–38, 40–41, 43–44, 46–47, 71
DiamondProxy.sol	92.31%	75%	100%	100%	16, 27
contracts/state-transition/chain-deps/facets
Admin.sol	86.21%	72.73%	92.31%	87.30%	109, 109–110, 112–113, 178, 180, 83–84, 94–95
Executor.sol	82.04%	63.41%	84.38%	87.90%	137–138, 192, 197, 202, 207, 212, 217, 222, 227, 230–231, 235–236, 240–242, 244–245, 260–261, 280, 294–295, 361–362, 425, 447–449, 469, 48, 48–49, 519–520, 528–529, 549, 556–557, 57, 59, 59–60, 619, 62, 620, 63, 646–647, 696–697, 70, 700–701, 71, 74–75, 775
Getters.sol	92.08%	100%	90.24%	93.10%	153, 206, 72, 77
Mailbox.sol	100%	100%	100%	100%
ZkSyncHyperchainBase.sol	92.86%	85.71%	100%	92.86%	55–56
contracts/state-transition/libraries
Diamond.sol	93.33%	80.77%	100%	95.96%	109–110, 113, 115, 117, 120, 198–199, 316
LibMap.sol	100%	100%	100%	100%
Merkle.sol	100%	100%	100%	100%
PriorityQueue.sol	100%	100%	100%	100%
TransactionValidator.sol	94.44%	88.24%	100%	96%	66–67, 69–70
contracts/upgrades
BaseZkSyncUpgrade.sol	58.20%	27.27%	100%	60.23%	104, 104–105, 108, 111, 114–115, 126, 126–127, 130, 133, 136–137, 151–153, 171–173, 212–213, 215, 215–216, 232–233, 249–250, 252–253, 258–259, 259–260, 271–272, 278–279, 285–286, 293–294, 298–299, 308–309, 311–312, 75–76
BaseZkSyncUpgradeGenesis.sol	56.67%	14.29%	100%	68.18%	25, 25–26, 33–34, 40–41, 52–53, 62–63, 65–66
DefaultUpgrade.sol	100%	100%	100%	100%
GenesisUpgrade.sol	100%	100%	100%	100%
contracts/vendor
AddressAliasHelper.sol	85.71%	75%	100%	85.71%	60, 62