feat(WechatSmallProject): 新增 微信小程序 课程（包含实验1-4）

WechatSmallProject/test3/pages/index/index.wxml

@@ -0,0 +1,32 @@
+<view class="container">
+
+  <view class="tab-box">
+    <view class="tab tab1 {{currentTab==0?'active':''}}" bindtap="switchTab" data-tab="0">
+      页面1
+    </view>
+    <view class="tab tab2 {{currentTab==1?'active':''}}" bindtap="switchTab" data-tab="1">
+      页面2
+    </view>
+    <view class="tab tab3 {{currentTab==2?'active':''}}" bindtap="switchTab" data-tab="2">
+      页面3
+    </view>
+  </view>
+
+  <view class="content-box">
+    <view wx:if="{{currentTab == 0}}" class="page page1">
+      <view class="title">第 1 个界面</view>
+      <view>对应 Tab1 内容</view>
+    </view>
+
+    <view wx:if="{{currentTab == 1}}" class="page page2">
+      <view class="title">第 2 个界面</view>
+      <view>对应 Tab2 内容</view>
+    </view>
+
+    <view wx:if="{{currentTab == 2}}" class="page page3">
+      <view class="title">第 3 个界面</view>
+      <view>对应 Tab3 内容</view>
+    </view>
+  </view>
+
+</view>