Implement submitBatch in the BundleBulker

[kristofgazso]

Currently you can only submit 1 userop in the BundleBulker

It would be useful to be able to submit multiple userops, each with its own specified inflator (which can differ for ops in the same batch)

Maybe could also have another one for the case when all the ops in the batch have the same inflator, so you don't need to specify the inflator for each and you can save some calldata

[dcposch]

BundleBulker is unopinionated and supports arbitrary bundles.

The example inflator is a proof-of-concept that makes bundles containing a single ERC20 transfer op.

I've added a second inflator that works the way you describe: you can submit n ops, each specifying their own per-op inflator. See #3

Why not make made BundleBulker always do that?

I want to support compression across ops, not just of individual ops. For example, an IInflator could use LibZip from Solady.