Add Checkpoints feature with routes, template, and JavaScript integration

- Introduced CheckpointsRoutes for managing checkpoints-related endpoints and handling the checkpoints page.
- Added checkpoints.html template for rendering the checkpoints interface with a work-in-progress message.
- Implemented checkpoints.js to manage the initialization of the Checkpoints page and its components.
- Updated LoraManager to include checkpoints routes in the application setup, enhancing overall functionality.

static/js/checkpoints.js

@@ -0,0 +1,36 @@
+import { appCore } from './core.js';
+import { state, initPageState } from './state/index.js';
+
+// Initialize the Checkpoints page
+class CheckpointsPageManager {
+    constructor() {
+        // Initialize any necessary state
+        this.initialized = false;
+    }
+    
+    async initialize() {
+        if (this.initialized) return;
+        
+        // Initialize page state
+        initPageState('checkpoints');
+        
+        // Initialize core application
+        await appCore.initialize();
+        
+        // Initialize page-specific components
+        this._initializeWorkInProgress();
+        
+        this.initialized = true;
+    }
+    
+    _initializeWorkInProgress() {
+        // Add any work-in-progress specific initialization here
+        console.log('Checkpoints Manager is under development');
+    }
+}
+
+// Initialize everything when DOM is ready
+document.addEventListener('DOMContentLoaded', async () => {
+    const checkpointsPage = new CheckpointsPageManager();
+    await checkpointsPage.initialize();
+});