feat: add gasless JIT TWAP scripts

[igorroncevic]

What and why

JIT-funded TWAPs can be registered and revoked from a fresh EOA without gas transactions. The scripts now use the standard ComposableCowPoller and CowShed 2.1.0 APIs from cowprotocol/cow-sdk#990 instead of a handwritten Poller adapter.

The branch uses exact PR #990 GitHub Packages previews until stable SDK packages are published.

Test

yarn test:composable-cow-poller

Try it

export RPC_URL_100="<GNOSIS_RPC_URL>"
export PRIVATE_KEY="<FUNDER_PRIVATE_KEY>"
export FUNDER_ADDRESS="<FUNDER_ADDRESS>"
export COMPOSABLE_COW_POLLER_ADDRESS="<REVIEWED_POLLER_ADDRESS>"
yarn jit-twap:register:gasless

Expected: the default dry run validates the registration without signing or submitting.

export SCHEDULE_ID="<SCHEDULE_ID>"
export PARENT_TWAP_ID="<PARENT_TWAP_ID>"
yarn jit-twap:revoke:gasless

Expected: the default dry run validates the schedule and parent TWAP without signing or submitting.