Implement FeeManager

MERGE REQUEST

Overview

This is the second MR for #3786 (closed) and is code broken out of !4101 (closed) This MR implements the Fee manager and adds documentation and testing.

Planned Follow Up Issues

• Next steps documented in #3977
• Restructure Loading fees from disk for pagination #4027 (closed)
• ACID Improvements #4028 (closed)

Example for Visual Changes (ie Screenshot, asciinema)

N/A

Checklist

Review and complete the checklist to ensure that the MR is complete before assigned to an approver.

• All new methods or updated methods have clear docstrings
• Testing added or updated for new methods
• Any new packages are added to Makefile and .gitlab-ci.yml
• API documentation updated for API updates
• Module README.md updated for changes to workflow
• Issue added to Sia-UI repo for new supporting features
• Changelog File Created

Issues Closed

Working on #3786 (closed)