hierachy and parent child system updates

- started working on an editor hierarchy window
- testing filters
- testing parent child relations without system
- testing root component
- thinking about how to get all entities that are not a child, but also don't have an other identifying component

Nerfed.Runtime/Components/Test.cs

@@ -0,0 +1,4 @@
+namespace Nerfed.Runtime.Components
+{
+    public readonly record struct Test();
+}