Banners for each bitesize readme (#101)

* banners for each bitesize readme

Author: jilfranco-unity

Basic/2DSpaceShooter/README.md

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+![Banner](Resources/spaceshooter_banner.png)
+<br><br>
+
 # 2D Space Shooter
 
 ![UnityVersion](https://img.shields.io/badge/Unity%20Version:-2021.3%20LTS-57b9d3.svg?logo=unity&color=2196F3)

Basic/2DSpaceShooter/Resources/spaceshooter_banner.png

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+![Banner](Resources/clientdriven_banner.png)
+<br><br>
+
 # Client Driven
 
 ![UnityVersion](https://img.shields.io/badge/Unity%20Version:-2021.3%20LTS-57b9d3.svg?logo=unity&color=2196F3)

Basic/ClientDriven/README.md

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+![Banner](Resources/dynamicprefab_banner.png)
+<br><br>
+
 # Dynamic Addressables Network Prefabs Sample
 
 ![UnityVersion](https://img.shields.io/badge/Unity%20Version:-2021.3%20LTS-57b9d3.svg?logo=unity&color=2196F3)

Basic/ClientDriven/Resources/clientdriven_banner.png

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+![Banner](Resources/invaders_banner.png)
+<br><br>
+
 # Invaders
 
 ![UnityVersion](https://img.shields.io/badge/Unity%20Version:-2021.3%20LTS-57b9d3.svg?logo=unity&color=2196F3)