better way to handle public key

[jrwbabylonlab]

Investigate a better way to handle the public key VS Public key without coordinates in the FE repos.
Right now, the naming is super confusing or long such as "finalityProviderPkWithNoCoord".

The scope of this ticket is to think about a better approach that can deal with this in a nicer way.
For example,

• can we have custom type for no coord pk?
• how about we leave all variable name as public key regardless if it's with or without the coord, then internally, we trim to no coord when needed. OR return as it is when detect it's already trimed to no coord.
• ...

[jrwbabylonlab]

Conversation tracked here: #23 (comment)