constants.go

Resolve "LinkedList datastructure"

Closes #18

## Introduction

Create new data structure LinkedList, add sorting, and fixing existing code issues/

Note: [Template Reference](https://hackmd.io/@akarimevatix/H1Qsmq23w)

## Worked on Items

- [x] #18 - LinkedList

## TODOs

- [ ] Create LinkedCollections each node will hold collection pointers
- [ ] Add chain equal checking for nodes.

## References

Sorting fixed

- [Sorting using golang lib](https://play.golang.org/p/sJ8a464USeV)
- [Pointer Strings Sort](https://play.golang.org/p/8V8YYdQrO6q)

## Notes

- N/A

## Merge Request Ordering

NA

See merge request !23