Add Layout Rules for pinning & scaling

[siliconivan]

Research info can be found in: https://www.notion.so/parabeac/Scaled-UI-f258c171dd7f408d968bad67ca1e20b4

Situations

• In a layout, if a node is pinned towards the front, then the InjectedContainer encapsulating the layout must inherit pinned to the front in it's constraint.
• In a layout, if no nodes are pinned, then the InjectedContainer encapsulating the layout should scale relatively.
• In the above 2 examples, the size & resizing of an element will then be determined by the padding encapsulating the element.

Situations.1-2-4.mov

• In a layout, if a node is pinned towards the back on the main axis and any node in front of it on the same axis is pinned to the front, we must use a Stack because the nodes will overlap. Take situation Hotfix/generator manager #3 [video].

Situation.3.mov

[siliconivan]

No longer relevant.