added: debug overlay functional

Assets/Core/UI/In-Game/Layouts/DebugOverlayRoot.uxml

@@ -0,0 +1,3 @@
+<ui:UXML xmlns:ui="UnityEngine.UIElements" xmlns:uie="UnityEditor.UIElements" editor-extension-mode="False">
+    <ui:VisualElement name="StretchBG" style="width: 100%; height: 100%;" />
+</ui:UXML>

Assets/Core/UI/In-Game/Layouts/DebugOverlayRoot.uxml.meta

@@ -0,0 +1,10 @@
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Assets/Core/UI/In-Game/Layouts/DebugOverlayValueTemplate.uxml

@@ -0,0 +1,10 @@
+<ui:UXML xmlns:ui="UnityEngine.UIElements" xmlns:uie="UnityEditor.UIElements" editor-extension-mode="False">
+    <ui:VisualElement name="VisualElement">
+        <ui:VisualElement style="flex-grow: 1; background-color: rgba(255, 144, 55, 0.47); border-top-left-radius: 2px; border-top-right-radius: 2px;">
+            <ui:Label text="Label" name="Label" style="font-size: 15px; -unity-font-style: bold; color: rgb(255, 255, 255); padding-top: 1px; padding-right: 1px; padding-bottom: 1px; padding-left: 8px;" />
+        </ui:VisualElement>
+        <ui:VisualElement style="background-color: rgba(202, 152, 104, 0.4);">
+            <ui:Label text="Label" name="Value" style="color: rgb(255, 255, 255); padding-left: 12px; padding-top: 2px; padding-bottom: 2px; border-bottom-right-radius: 2px; border-bottom-left-radius: 2px;" />
+        </ui:VisualElement>
+    </ui:VisualElement>
+</ui:UXML>

Assets/Core/UI/In-Game/Layouts/DebugOverlayValueTemplate.uxml.meta

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