Various Improvements

[krazyjakee]

Includes various improvements to the project. The changes include:

• Removing a file from the selection on the .gut_editor_config.json file.
• Adding a new project to the Examples section on the README.md file.
• Adding a new script to the addons/nodot folder that extends the Area3D class to include character and player detection.
• Adding a new signal to the CollectableManager.gd script to notify when a new collectable is added.
• Updating the GlobalSignal.gd script to accept an argument when triggering a signal.
• Adding a new InputManager.gd script to manage input logic.
• Adding a new CameraArea3D.gd script to override the camera when the current player enters an area.
• Adding a new CharacterExtension3D.gd script to add extension logic to NodotCharacter3D.
• Removing the CharacterMover.gd script.

Overall, these changes improve the project by adding new functionality and improving the existing code.