chore(ctb): Add comments, rebuild

fix(ctb): Refactor and fix the L2 bridge tests

fix(ctb): Ensure consistent event ordering using super

The _emit methods in child contracts now use super to
call emit the new events.
The legacy events now always precedes the new event.

test(ctb): Use kwargs syntax in _preBridgeX() funcs

chore(ctb): Improve doc comments on _emit funcs

fix(ctb): Add _emitETHBridgeInitiated

fix(ctb): Add _emitERC20BridgeFinalized

fix(ctb): Add remaining event wrapper functions

op-proposer: Move to shared signer setup & simplified init

This removes the NewL2OutputSubmitterWithSigner function and places
the old NewL2OutputSubmitter code inside the main function.

op-service: Migrate tx manager package

fix batch-deriv-chain.svg

This places the txmgr package in the op-service folder instead of
the op-proposer folder. This removes the proposer for being a dependency
of the batcher. The txmgr code is shared code so it makes more sense to
be there.

feat(e2e): Garbage batch test

feat: l1 and l2 source validation

fix spec/assets/engine.svg

whoops

Throw on unexpected garbage kind

`l2geth` -> `geth` dep update

Go doesn't fall through in switch cases by default