Added missing sections: GuiState, Interactable (#875)

There was just nothing in those 2 sections.

## Changes

GuiObject.GuiState and GuiObject.Interactable now have short summaries
and long descriptions of how they work.

## Checks

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- [ ] I understand and agree that this contribution and a record of it
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- [ ] To the best of my knowledge, all proposed changes are accurate.

---------

Author: vifgaming1

content/en-us/reference/engine/classes/GuiObject.yaml

@@ -369,8 +369,16 @@ properties:
       - UI
     writeCapabilities: []
   - name: GuiObject.GuiState
-    summary: ''
-    description: ''
+    summary: |
+      Determines whether the player's mouse is being actively pressed on the
+      `Class.GuiObject` or not.
+    description: |
+      When the player's finger is being tapped and held on the `Class.GuiObject`, the
+      `Class.GuiObject.GuiState|GuiState` of the `Class.GuiObject` will be set to `Enum.GuiState.Press|Press`. Similarly,
+      When the player's finger is being released from the `Class.GuiObject`, the
+      `Class.GuiObject.GuiState|GuiState` of the `Class.GuiObject` will be set to `Enum.GuiState.Idle|Idle`,
+      and when `Class.GuiObject.Interactable|Interactable` is turned off on the `Class.GuiObject`, the `Class.GuiState`
+      of the `Class.GuiObject` will be set to `Enum.GuiState.NonInteractable|NonInteractable`.
     code_samples: []
     type: GuiState
     tags:
@@ -389,8 +397,26 @@ properties:
       - UI
     writeCapabilities: []
   - name: GuiObject.Interactable
-    summary: ''
-    description: ''
+    summary: | 
+      Determines whether the `Class.GuiButton` can be interacted with or not, or if
+      the `Enum.GuiState|GuiState` of the `Class.GuiObject` is changing or not.
+    description: |
+      Determines whether the `Class.GuiButton` can be interacted with or not, or if
+      the `Enum.GuiState|GuiState` of the `Class.GuiObject` is changing or not.
+      
+      On a `Class.GuiButton`:
+      - When the `Class.GuiObject.Interactable|Interactable` setting on the `Class.GuiButton` is
+      set to `false`, the `Class.GuiButton` will no longer be able to be pressed or clicked, and the
+      `Class.GuiObject.GuiState|GuiState` will be constantly set to `Enum.GuiState.NonInteractable|NonInteractable`.
+      - When the `Class.GuiObject.Interactable|Interactable` setting on the `Class.GuiButton` is
+      set to `true`, the `Class.GuiButton` will behave normally again and the `Class.GuiObject.GuiState|GuiState` will
+      behave normally.
+      
+      On a `Class.GuiObject`:
+      - When the `Class.GuiObject.Interactable|Interactable` setting on the `Class.GuiButton` is
+      set to `false`, the `Class.GuiObject.GuiState|GuiState` will be constantly set to `Enum.GuiState.NonInteractable|NonInteractable`.
+      - When the `Class.GuiObject.Interactable|Interactable` setting on the `Class.GuiButton` is
+      set to `true`, the `Class.GuiObject.GuiState|GuiState` will behave normally again.
     code_samples: []
     type: bool
     tags: []