add a bunch of gradients and set up the MNML vfx to use them

Assets/Preferences.cs

@@ -5,7 +5,7 @@ using UnityEngine;
 
 [ExecuteAlways]
 public class Preferences : MonoBehaviour {
-    ThemeSelector themeSelector;
+    public ThemeSelector themeSelector;
     public PreferenceData data;
 
     void Awake() {
@@ -18,4 +18,8 @@ public class Preferences : MonoBehaviour {
         data.themeIndex = i;
         data.Save();
     }
+
+    public Gradient Theme() {
+        return themeSelector.CurrentTheme();
+    }
 }