XCM dump tool

[sandreim]

Similarly to how tcpdump works, we dump the messages matching some criteria into a file.

Example of usage:
xcm_dump --block-range 12222,13000 -t any -p 1003 size and greater 64 -o messages.json - will dump messages of at least 64 bytes that are sent/received on any transport(ump,dmp,hrmp) by parachain 1003.

Before implementing this we should figure out:

• how to store the messages
• if we want to look inside of the messages (decode) as part of the query