GUI: Add "Not a decompiler" dialog on startup

Il2CppInspector.GUI/User.Designer.cs

@@ -0,0 +1,38 @@
+//------------------------------------------------------------------------------
+// <auto-generated>
+//     This code was generated by a tool.
+//     Runtime Version:4.0.30319.42000
+//
+//     Changes to this file may cause incorrect behavior and will be lost if
+//     the code is regenerated.
+// </auto-generated>
+//------------------------------------------------------------------------------
+
+namespace Il2CppInspector.GUI {
+    
+    
+    [global::System.Runtime.CompilerServices.CompilerGeneratedAttribute()]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Microsoft.VisualStudio.Editors.SettingsDesigner.SettingsSingleFileGenerator", "16.4.0.0")]
+    internal sealed partial class User : global::System.Configuration.ApplicationSettingsBase {
+        
+        private static User defaultInstance = ((User)(global::System.Configuration.ApplicationSettingsBase.Synchronized(new User())));
+        
+        public static User Default {
+            get {
+                return defaultInstance;
+            }
+        }
+        
+        [global::System.Configuration.UserScopedSettingAttribute()]
+        [global::System.Diagnostics.DebuggerNonUserCodeAttribute()]
+        [global::System.Configuration.DefaultSettingValueAttribute("True")]
+        public bool ShowDecompilerWarning {
+            get {
+                return ((bool)(this["ShowDecompilerWarning"]));
+            }
+            set {
+                this["ShowDecompilerWarning"] = value;
+            }
+        }
+    }
+}