Add C# support to the addon.
Reference: https://github.com/nathanhoad/godot_dialogue_manager/blob/main/addons/dialogue_manager/DialogueManager.cs
## Why do you think it should be added?
C# support is surely something that many developers would benefit, allowing to integrate quest system with many codebases that already use it.
Many addons already support C#, such as DialogueManager by Nathan Hoad,
Describe the feature
Add C# support to the addon. Reference: https://github.com/nathanhoad/godot_dialogue_manager/blob/main/addons/dialogue_manager/DialogueManager.cs ## Why do you think it should be added? C# support is surely something that many developers would benefit, allowing to integrate quest system with many codebases that already use it. Many addons already support C#, such as DialogueManager by Nathan Hoad,