Add a handler for communication between Citrea and Clementine

[ceyhunsen]

Proposal Description

Currently, some functions prepares JSON call for Citrea RPC endpoint and sends it directly. There is a need for new crate that needs to streamline this.

New crate should:

• [ ] Prepare correct JSON formatted parameters
• [ ] Create a request and send it
• [ ] Have functions that converts bridge selectors to rust functions
• [ ] Have tests that can be disabled if environment is not suitable for reaching out Citrea

See: https://gist.github.com/okkothejawa/a9379b02a16dada07a2b85cbbd3c1e80

[ekrembal]

I think no need for function selectors, since we will use few