feat: add TaskBoard demo and refactor project structure

mock/demoTask.ts

@@ -0,0 +1,44 @@
+import { defineMock } from '@umijs/max';
+
+const tasks: any[] = [];
+for (let i = 0; i < 20; i += 1) {
+  tasks.push({
+    id: `${i}`,
+    title: `Task Name ${i}`,
+    status: i % 3 === 0 ? 'todo' : i % 3 === 1 ? 'doing' : 'done',
+    description: 'This is a description for the task.',
+    priority: Math.floor(Math.random() * 3), // 0, 1, 2
+    createdAt: new Date().toISOString(),
+  });
+}
+
+export default defineMock({
+  'GET /api/demo/tasks': (req, res) => {
+    const { keyword, current = 1, pageSize = 20 } = req.query as any;
+    let dataSource = [...tasks].slice().reverse();
+
+    if (keyword) {
+      dataSource = dataSource.filter((item) => item.title.includes(keyword));
+    }
+
+    const start = (current - 1) * pageSize;
+    const end = start + pageSize;
+
+    setTimeout(() => {
+      res.json({
+        success: true,
+        data: dataSource.slice(start, end),
+        total: dataSource.length,
+      });
+    }, 500);
+  },
+  'POST /api/demo/tasks': (req, res) => {
+    res.json({ success: true, data: { ...req.body, id: `${tasks.length}` } });
+  },
+  'PUT /api/demo/tasks': (req, res) => {
+    res.json({ success: true });
+  },
+  'DELETE /api/demo/tasks': (req, res) => {
+    res.json({ success: true });
+  },
+});