Movable and resizable panels (RE-SS3D#1288)

* Add panel plugin

* CursorHandler

* Make more space, make enabling/disabling work on panels

* Change grid depending on its size

* change menu width

* Add cursor handler (again), change values a bit

* Fix object object ghost

* Add debug

* Remove debug

* Change AssetGridManager namesapace, add a little more doc

---------

Co-authored-by: Mechar418 <[email protected]>

Assets/Content/Systems/UI/Systems/Construction/ConstructionMenu.prefab

@@ -1132,7 +1132,7 @@ RectTransform:
   m_AnchorMin: {x: 1, y: 0}
   m_AnchorMax: {x: 1, y: 0}
   m_AnchoredPosition: {x: -224.96143, y: 322.66217}
-  m_SizeDelta: {x: 170.0795, y: 238.238}
+  m_SizeDelta: {x: 180, y: 238.238}
   m_Pivot: {x: 0.5, y: 0.5}
 --- !u!222 &6060677056020711314
 CanvasRenderer:
@@ -3242,6 +3242,7 @@ GameObject:
   m_Component:
   - component: {fileID: 2180168398058430789}
   - component: {fileID: 4686284081446859306}
+  - component: {fileID: 5112122915852808111}
   m_Layer: 5
   m_Name: Content
   m_TagString: Untagged
@@ -3294,6 +3295,18 @@ MonoBehaviour:
   m_Spacing: {x: 5, y: 5}
   m_Constraint: 1
   m_ConstraintCount: 2
+--- !u!114 &5112122915852808111
+MonoBehaviour:
+  m_ObjectHideFlags: 0
+  m_CorrespondingSourceObject: {fileID: 0}
+  m_PrefabInstance: {fileID: 0}
+  m_PrefabAsset: {fileID: 0}
+  m_GameObject: {fileID: 6243703131314193102}
+  m_Enabled: 1
+  m_EditorHideFlags: 0
+  m_Script: {fileID: 11500000, guid: ca78eb30848a4fe40b2c16cdfff48e37, type: 3}
+  m_Name: 
+  m_EditorClassIdentifier: 
 --- !u!1 &6321497670735554424
 GameObject:
   m_ObjectHideFlags: 0
@@ -3705,7 +3718,7 @@ GameObject:
   m_Icon: {fileID: 0}
   m_NavMeshLayer: 0
   m_StaticEditorFlags: 0
-  m_IsActive: 1
+  m_IsActive: 0
 --- !u!224 &4235739587677223029
 RectTransform:
   m_ObjectHideFlags: 0
@@ -3808,7 +3821,7 @@ MonoBehaviour:
   m_TargetGraphic: {fileID: 2287788854832640797}
   m_HandleRect: {fileID: 3379647602017452814}
   m_Direction: 2
-  m_Value: 0
+  m_Value: 1
   m_Size: 1
   m_NumberOfSteps: 0
   m_OnValueChanged:
@@ -4380,7 +4393,7 @@ RectTransform:
   m_RootOrder: 0
   m_LocalEulerAnglesHint: {x: 0, y: 0, z: 0}
   m_AnchorMin: {x: 0, y: 0}
-  m_AnchorMax: {x: 0, y: 0}
+  m_AnchorMax: {x: 1, y: 1}
   m_AnchoredPosition: {x: -0.000030517578, y: -0.00018310547}
   m_SizeDelta: {x: 20, y: 20}
   m_Pivot: {x: 0.5, y: 0.5}