testconsts

Resolve "LinkedCollections"

Closes #19

## Introduction `LinkedCollection`

A linkedlist type of data structure collection where each node holds string collection as a value.

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

## Worked on Items

- [x] #19 LinkedCollections, LinkedCollectionNode
- [x] #12 Equality compare fix for LinkedCollections

## TODOs

- [ ] Equality compare fix for LinkedList
- [ ] Remove issue fix, currently removing two items together fails.

## References

- [Go Slice Tricks Cheat Sheet](https://ueokande.github.io/go-slice-tricks/)
- [SliceTricks · golang/go Wiki](https://github.com/golang/go/wiki/SliceTricks)
- [ueokande/go-slice-tricks: Cheat Sheet for Go Slice Tricks](https://github.com/ueokande/go-slice-tricks)
- [Quick Sort in Go (Golang) - golangprograms.com](https://www.golangprograms.com/golang-program-for-implementation-of-quick-sort.html)
    - [Sorting using golang lib](https://play.golang.org/p/sJ8a464USeV)
    - [Pointer Strings Sort](https://play.golang.org/p/8V8YYdQrO6q)
- [Golang Array process issue without copying (!Important)](https://play.golang.org/p/GvdJMPmCStz)
- [Linked List | Set 2 (Inserting a node) - GeeksforGeeks](https://www.geeksforgeeks.org/linked-list-set-2-inserting-a-node/)
- [Go Data Structures: Linked List](https://flaviocopes.com/golang-data-structure-linked-list/)

## Notes

- N/A

See merge request !24