Rename project from "Cheating Daddy" to "Mastermind" across all files, update version to 0.6.0, and implement migration functionality for users with existing configurations. Enhance onboarding experience with migration options and update relevant documentation.

src/index.js

@@ -295,6 +295,26 @@ function setupStorageIpcHandlers() {
             return { success: false, error: error.message };
         }
     });
+
+    // ============ MIGRATION ============
+    ipcMain.handle('storage:has-old-config', async () => {
+        try {
+            return { success: true, data: storage.hasOldConfig() };
+        } catch (error) {
+            console.error('Error checking old config:', error);
+            return { success: false, error: error.message };
+        }
+    });
+
+    ipcMain.handle('storage:migrate-from-old-config', async () => {
+        try {
+            const success = storage.migrateFromOldConfig();
+            return { success: true, data: success };
+        } catch (error) {
+            console.error('Error migrating from old config:', error);
+            return { success: false, error: error.message };
+        }
+    });
 }
 
 function setupGeneralIpcHandlers() {