Feature/3/camera system

[Cartier32]

Objective

• This PR addresses issue Create camera system #3. It proposes implementations for the game's camera system using bevy's cameras. This plugin has one mainCamera marker component that tracks an entity with the cameraTarget component. This plugin also handles the creation of the main camera, and the zooming in/out of the main camera.

Solution

• The solution to this issue was to use Bevy's built in camera system and then modifying camera attributes to achieve the behavior that I was looking for. Looked at Bevy's camera examples and the Bevy guide book to help me come to my solution.

New components

• MainCamera: Component that marks the main camera of our game
• CameraTarget: Component that marks the main camera's target

New systems

• setup_main_camera: Creates and sets up the main camera for our game
• update_camera: Updates the main camera's translation to the entity with the CameraTarget marker's translation
• zoom_camera: Zooms the camera in or out depending on mouse wheel input. Modifies Main Camera's projection scale.
• display_dudes: Added system to the debug_plugin that displays some sprites. One stationary sprite, then one sprite that continuously falls that the camera tracks. Can also zoom in and out during this state.

Testing

• I tested these changes through the debug plugin, spawned some entities to track and it was tracking, zoom also works
• Don't believe that anything needs anymore testing
• Refer to the debug plugin if you would like to test changes, comments explain everything

[Cartier32]

Incorporated all changes, thanks for an in depth review 💯