[Move] Part-1 Classes into Different Library - Neo.IO

[cschuchardt88]

Description

Reorganized and move classes from neo library to neo.io library.

Fixed problems and warnings that occurred. Along with naming violations.

Change Log

• Move Cache.cs to ./src/Neo.IO/Caching Folder
• Move FIFOCache.cs to ./src/Neo.IO/Caching Folder
• Move HashSetCache.cs to ./src/Neo.IO/Caching Folder
• Move IndexedQueue.cs to ./src/Neo.IO/Caching Folder
• Move KeyedCollectionSlim.cs to ./src/Neo.IO/Caching Folder

Type of change

• Optimization (the change is only an optimization)
• Style (the change is only a code style for better maintenance or standard purpose)
• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

How Has This Been Tested?

• Unit Testing

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules