docs: Update manual

Author: jcs090218

docs/ScriptReference/UI/JCS_CanvasComp.md

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+# JCS_CanvasComp
+
+Component that requires the component `JCS_Canvas` without actually inherit the class `JCS_Canvas`.
+
+## Variables
+
+| Name    | Description                           |
+|:--------|:--------------------------------------|
+| mCanvas | The canvas this component to control. |
+
+## Functions
+
+| Name             | Description                                       |
+|:-----------------|:--------------------------------------------------|
+| Show             | Show the canvas, so it's visible on the screen.   |
+| Hide             | Hide the canvas, so it's invisible on the screen. |
+| ToggleVisibility | Toggle the canvas' visibility.                    |