[TECHDEBT] Tackle TODOs in shared/modules Issue #232

[andrewnguyen22]

Description

• Tackle / recategorize all non-blocked TODOs in shared/modules

Techdebt week emphasizes code health. Particularly, removing all placeholder and hacky code.

The past few months, shared/modules have built up quite a few TODOs.

The PR should remove all non-blocked TODOs

• Reduce cognitive load
• Increase code health

Issue

Fixes #232

Type of change

Please mark the relevant option(s):

• New feature, functionality or library
• Bug fix
• Code health or cleanup
• Major breaking change
• Documentation
• Other

List of changes

• Deprecated persMod.ResetContext() for -> persRWContext.ResetContext() for more appropriate encapsulation
• Added ticks to CHANGELOG.md
• Removed reference to Utility Mod's BigIntToString() and used internal BigIntToString()
• Used proper TODO/INVESTIGATE/DISCUSS convention across package
• Moved TxIndexer Package to Utility to properly encapsulate

Testing

• make develop_test
• LocalNet w/ all of the steps outlined in the README

Required Checklist

• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have tested my changes using the available tooling
• I have updated the corresponding CHANGELOG

If Applicable Checklist

• I have updated the corresponding README(s); local and/or global
• I have added tests that prove my fix is effective or that my feature works

[Olshansk]

Left a couple extra comments but changes LGTM otherwise.

Please resolve conflicts with main.

[Olshansk]

Changes LGTM but I'd like to get #282 in first since it might catch unit test failures that may or may not have been introduced.

[andrewnguyen22]

@Olshansk all tests pass for me after #282 and merge with main