Batch message support

[hieronx]

No description provided.

[AStox]

It's being implicitly tested since it's in BaseTest now, but I think it would be nice to add a couple explicit unit tests to Messages.t.sol for batched messages

[github-actions]

Coverage after merging batch into main will be

90.29%

Coverage Report

File	Stmts	Branches	Funcs	Lines	Uncovered Lines
src
Auth.sol	100%	100%	100%	100%
CentrifugeRouter.sol	18.42%	12.50%	25%	18.18%	16, 27–29, 34–35, 35, 35–38, 43–44, 44, 44–47, 53, 60, 65–66, 66, 66–67
ERC7540Vault.sol	85.21%	78.57%	92.86%	82.56%	117, 123, 162–164, 186–188, 59–65, 67–68, 88
Escrow.sol	100%	100%	100%	100%
InvestmentManager.sol	90.65%	88.04%	86.36%	92.97%	134, 248, 257, 301, 330, 352, 384, 388–389, 511, 554–557, 566–569, 569, 569, 60–61, 63–64
PoolManager.sol	95.38%	99.06%	76.92%	95.91%	203, 206, 66–69, 71–72
Root.sol	92.11%	88.89%	92.86%	93.18%	124, 129, 149–150, 38
src/admin
Guardian.sol	66.67%	50%	77.78%	63.64%	23–25, 29, 29, 63
src/factories
ERC7540VaultFactory.sol	100%	100%	100%	100%
RestrictionManagerFactory.sol	66.67%	100%	50%	70%	23, 25–26
TrancheTokenFactory.sol	100%	100%	100%	100%
TransferProxyFactory.sol	85.71%	100%	75%	87.50%	38
src/gateway
Gateway.sol	90.91%	100%	83.33%	86.11%	41–43, 45–46
src/gateway/routers
Aggregator.sol	89.47%	80.77%	83.33%	95.45%	108–109, 113, 152, 155–156, 159, 167, 40, 42–43, 49, 51, 99
src/gateway/routers/axelar
Forwarder.sol	80%	100%	75%	75%	38, 40–41
Router.sol	84.21%	100%	66.67%	75%	34–35
src/token
ERC20.sol	97.62%	95%	100%	98.63%	201, 73–74
RestrictionManager.sol	94.83%	100%	66.67%	100%
Tranche.sol	77.14%	62.50%	72.73%	87.50%	55, 64, 73, 83, 93