This issue is dedicated to tracking the implementation of pallet crowdloan. Reference Rust implementation is [here](https://github.com/polkadot-fellows/runtimes/blob/dev-asset-hub-migration/pallets/rc-migrator/src/crowdloan.rs) and [here](https://github.com/polkadot-fellows/runtimes/blob/dev-asset-hub-migration/pallets/ah-migrator/src/crowdloan.rs).
