made the animated tiles doc file. needs images and gif

DocFX/documentation/Topics/topic_AnimatedTiles.md

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+# Animated Tiles
+Though LDtk does not support animated tiles, the importer has some support for it through the use of tileset tile `customData`.  
+![AnimatedTiles](thing.gif)  
+
+## Setup
+- To animate a tile, navigate to LDtk's Tilesets section.  
+![Tilesets](.png)  
+- Click on a tile and a text dialogue will appear, where you can enter custom information.  
+![CustomDataDialogue](.png)  
+- Then you can put information in to tell the importer how the tile should animate.  
+- You type in a keyword, followed by one or more values separated by commas. See the table below.  
+- There must only be one keyword per line.  
+![AnimatedTilesCustomDataExample](.png)  
+
+| Keyword                | Type    | Default | Description                                                                                                                                                   | Example                                                  |
+|------------------------|---------|---------|---------------------------------------------------------------------------------------------------------------------------------------------------------------|----------------------------------------------------------|
+| `animatedSprites`      | `int`   | (empty) | The tile IDs to use in the animation.<br/>                                                                                                                    | `animatedTiles 0,1,2,3,3,3,2,1`                          |
+| `animationSpeed`       | `float` | 1       | The animation speed.<br/>Put one number for a fixed value.<br/>Put two numbers for a random range.                                                            | `animationSpeed 2`<br/>`animationSpeed 1.5, 3`           |
+| `animationStartTime`   | `float` | 0       | The initial animation time of a tile.<br/>Put one number for a fixed value.<br/>Put two numbers for a random range.                                           | `animationStartTime 0.5`<br/>`animationStartTime 0, 2.5` |
+| `animationStartFrame`  | `int`   | 0       | The initial animation frame of a tile.<br/>Put one number for a fixed value.<br/>Put two numbers for a random range.<br/>This overrides `animationStartTime`. | `animationStartFrame 2`<br/>`animationStartFrame 0, 3`   |
+
+- All keywords are optional. If one is left unused, the value will be it's default displayed in the table below.and have a default value if unused, but `animatedSprites` is required to do any animation.  
+- The naming convention is based on unity's own [TileAnimationData](https://docs.unity3d.com/ScriptReference/Tilemaps.TileAnimationData.html).
+
+## Disclaimer
+- You can only use other tiles within the scope of the same tileset. No external sprites may be used.
+- All aspects of animation randomness are determined in runtime and not during the import process, so every start will be different.