Update Json Graph Traversal Algorithm

[acpaquette]

This PR updates the JSON traversal algorithm to build the underlying graph structure that jsoncrack uses. There are a couple of changes that also address a bug in graph construction. Below is a screenshot better detailing the changes:

• I added a root node to the tree. This makes the structure of the graph a little clearer and allows the "Member" property to remain at the same level as its "brother" properties. This root node also allows the graph structure to parse consistently from the root elements to the leaves.
• Arrays now construct empty child nodes for arrays of objects or nested arrays. We see that in the "Members" array of objects and in the nested array of powers for the first member. This ensures that all elements within a list of objects remain at the same level and that nested arrays appropriately display in the graph.

Fixes #385

[TallTed]

Tweaked human facing punctuation, spelling, etc.

[paimagham]

Can I work on this.

[AykutSarac]

Good job! It doesn't seem to work with arrays right now.
Also let's take feedbacks from the community :)

[acpaquette]

@AykutSarac Can you provide the failing array case that you found? Or is it the way arrays are being unpacked?

[AykutSarac]

@AykutSarac Can you provide the failing array case that you found? Or is it the way arrays are being unpacked?

It happened when I wrapped the default JSON within an array [].

[acpaquette]

@AykutSarac I think I fixed the array issue you pointed out! Thanks for assistance with testing the change. Here is the format of the json when we wrap the whole example in an array:

[TallTed]

trivial, human-facing