feat: restructure feature management and update project files

- Introduced a new `package-lock.json` to manage dependencies.
- Removed obsolete `.automaker/feature_list.json` and replaced it with a new structure under `.automaker/features/{id}/feature.json` for better organization.
- Updated various components to utilize the new features API for managing features, including creation, updates, and deletions.
- Enhanced the UI to reflect changes in feature management, including updates to the sidebar and board view.
- Improved documentation and comments throughout the codebase to clarify the new feature management process.

app/src/components/views/feature-suggestions-dialog.tsx

@@ -202,12 +202,13 @@ export function FeatureSuggestionsDialog({
         skipTests: true, // As specified, testing mode true
       }));
 
-      // Merge with existing features
-      const updatedFeatures = [...features, ...newFeatures];
+      // Create each new feature using the features API
+      for (const feature of newFeatures) {
+        await api.features.create(projectPath, feature);
+      }
 
-      // Save to file
-      const featureListPath = `${projectPath}/.automaker/feature_list.json`;
-      await api.writeFile(featureListPath, JSON.stringify(updatedFeatures, null, 2));
+      // Merge with existing features for store update
+      const updatedFeatures = [...features, ...newFeatures];
 
       // Update store
       setFeatures(updatedFeatures);