handle new note button & note list

browser/main/store.js

@@ -105,6 +105,16 @@ function repositories (state = initialRepositories, action) {
           targetRepo.folders.splice(targetFolderIndex, 1)
         }
 
+        return repos
+      }
+    case 'ADD_NOTE':
+      {
+        let repos = state.slice()
+        let targetRepo = _.find(repos, {key: action.repository})
+
+        if (targetRepo == null) return state
+        targetRepo.notes.push(action.note)
+
         return repos
       }
   }