📝 Add rig structure explanation to rigs/overview

Author: SnaveSutit

src/routes/docs/[...4]rigs/[...1]overview/+page.md

@@ -8,3 +8,13 @@ description: An overview of what a Rig is.
 ## What is a Rig?
 
 A Rig is the collection of entities that make up an Animated Java model. Calling a Rig's summon function will create a Rig Instance in your Minecraft world.
+
+Rigs are made up of the following entities:
+
+-   The Root Entity: The base entity of a Rig. All other rig entities (with the exception of [Locators](/docs/the-blueprint-format/locators) with [Use Entity](/docs/the-blueprint-format/locators#use-entity) enabled, and [Cameras](/docs/the-blueprint-format/cameras)) are passengers of the root entity
+-   [Bones](/docs/the-blueprint-format/bones): Displays a custom model.
+-   [Block Displays](/docs/the-blueprint-format/block-displays): Displays a vanilla block.
+-   [Item Displays](/docs/the-blueprint-format/item-displays): Displays an vanilla item.
+-   [Text Displays](/docs/the-blueprint-format/text-displays): Displays text.
+-   Data Entity: A marker entity that stores all of the NBT data for the Rig.
+-   [Cameras](/docs/the-blueprint-format/cameras): Used to animate smooth camera movements.