major rework of the keybinds api

MiraAPI.Example/ExampleKeybinds.cs

@@ -0,0 +1,10 @@
+using MiraAPI.Keybinds;
+using Rewired;
+
+namespace MiraAPI.Example;
+
+[RegisterCustomKeybinds]
+public static class ExampleKeybinds
+{
+    public static MiraKeybind NeutralWinKeybind { get; } = new("Neutral Win", KeyboardKeyCode.C, [ModifierKey.Shift]);
+}