Return isomorphic binding relation in API

[Keith-CY]

Now the binding relation, e.g.

BTC UTXO[n] was bound to CKB Cell[m]

was built in the frontend by parsing cell's lock script's args, but there are at most 10 cells on the page, so only 10 entries were built,

e.g. https://pudge.explorer.nervos.org/transaction/0xf2d76873ef470e5df49165e0ebb06eb40ccbaa9afefa2739227406fec7b3e13f, all ckb outputs are bound to a BTC UTXO, but only the first 10 are marked.

So the binding relation should be returned in the API

[Keith-CY]

This is expected to be done before RGB++ applications launch but after the RGB++ assets page onboarding.