Fix typing issues

package.json

@@ -1,6 +1,6 @@
 {
   "name": "taskflow2",
-  "version": "0.0.0",
+  "version": "0.0.1",
   "description": "a little task manager",
   "main": ".vite/build/main/index.js",
   "author": "@audrey-yang",

src/global.d.ts

@@ -0,0 +1,15 @@
+interface Window {
+  api: {
+    createTask: (task: Task) => Promise<any>;
+    getAllTasks: () => Promise<Task[]>;
+    getChildTasks: (parentId: string) => Promise<Task[]>;
+    getChildTasksIncomplete: (parentId: string) => Promise<Task[]>;
+    getChildTasksComplete: (parentId: string) => Promise<Task[]>;
+    countChildTasksByStatus: (parentId: string, status: Status) => Promise<number>;
+    changeTaskPriority: (id: string, priority: Priority) => Promise<any>;
+    changeTaskStatus: (id: string, status: Status) => Promise<any>;
+    changeTaskTitle: (id: string, title: string) => Promise<any>;
+    changeTaskNote: (id: string, note: string) => Promise<any>;
+    deleteTask: (id: string) => Promise<void>;
+  };
+}