Refactor wallet library to be modular with non-dependent classes (optimization of compilation time & memory)

[cogutvalera]

Instructions

• User Story
• Impacts
• Additional Context (optional)

User Story
As a developer I want to optimize wallet library compilation time and memory so that wallet library will be modular divided into different non-dependent classes.

Impacts

• API (the application programming interface)
• Build (the build process or something prior to compiled code)
• CLI (the command line wallet)
• Deployment (the deployment process after building such as Docker, Travis, etc.)
• DEX (the Decentralized EXchange, market engine, etc.)
• P2P (the peer-to-peer network for transaction/block propagation)
• Performance (system or user efficiency, etc.)
• Protocol (the blockchain logic, consensus, validation, etc.)
• Security (the security of system or user data, etc.)
• UX (the User Experience)
• Other (please add below)

Additional Context (optional)
@oxarbitrage commented here #950 (comment)
@jmjatlanta commented here #1413 (comment)
@pmconrad commented here #1413 (comment)

CORE TEAM TASK LIST

• Evaluate / Prioritize Feature Request
• Refine User Stories / Requirements
• Define Test Cases
• Design / Develop Solution
• Perform QA/Testing
• Update Documentation

[cogutvalera]

@ryanRfox assign this issue to me please as continue after #950 wallet.cpp refactoring issue

Thanks !

[cogutvalera]

this issue requires more time and efforts (also look comments in additional context of this issue description)

[ryanRfox]

Moving to (next) Feature Release because @cogutvalera has expressed interest in this and a few related Issues. My intent is the Core Team will discuss, prioritize and determine next steps by commenting within these Issues. We are going into a Release week, so our focus is elsewhere. Please expect an update near 13 FEB.

[cogutvalera]

Thanks !

[abitmore]

Done #2013.