[Do not merge] Demo for Crust's xstorage usage

[mmyyrroonn]

This is a demo PR for using crust's xstorage pallet. xstorage is a helper pallet to send cross-chain storage orders to crust network.

There are two key steps in this pallet:

1. Withdraw fee token.
2. Send XCM.Transact message including storage order extrinsic through XCMP.

xstorage pallet is not the only option. You can implement your own transact sender, such as moonbeam or just pallet-xcm.

[mohamedelshami]

Hey @mmyyrroonn thanks for this. This is probably something we will have to test on Arctic first, which is the right place to integrate new features.

Also, would like to learn more about Crust network.

[mmyyrroonn]

Hey @mmyyrroonn thanks for this. This is probably something we will have to test on Arctic first, which is the right place to integrate new features.

Also, would like to learn more about Crust network.

Hi, I modified the content. But it's not working right now. As we discussed in TG, please add the left part. If you have any questions about the pallet, I'm willing to help. 😄