feat: prepare ckb4ibc packet test

[ashuralyk]

fixed: #257

according to the work of packet test between Axon endpoints, I complete some part of Ckb4Ibc endpoint to fit its packet test for an upcoming use, and currently leaves features to do on below:

• arrangement of the ckb transaction assembly
• check the correctness of some other query interfaces, like query_packet_commitment and so on
• work on the missing feature of packet transaction assembly especially for the unordered channel status

[ashuralyk]

@Flouse the refactored ibc-ckb-contracts has passed the test, and the complete transaction assembly process in inc-packet layer has finished

p.s. packet layer leaves taking advantage of useless WriteAck packet cell to do

[ashuralyk]

@Flouse @jjyr @blckngm checklist of this PR has been done and it's better to start a review before this PR comes too big