wCCD documentation

[DOBEN]

Task description

Documenting the w_ccd contract and adding a tutorial if needed.

Sub-tasks

• Descriptions of the general functionalities of a wrapped token contract

• Explicit descriptions of the new features added to the wCCD smart contract

• Descriptions on how front-ends can listen for events

• An example interaction with a state-mutative function

• An example interaction with a non-state-mutative function

• Off-chain app example with a “wrap”, “unwrap”, “set_operator”, and “transfer” button

• Integration example with the Rust SDK