feat: init fitness-coach (backend + miniprogram)

- backend: NestJS service with exercise/plan data
- miniprogram: WeChat mini program client
- exclude node_modules, dist, runtime data-store, local env

miniprogram/pages/collection-detail/collection-detail.js

@@ -0,0 +1,42 @@
+const app = getApp();
+const svc = require('../../services/exercise');
+
+Page({
+  data: {
+    statusBarHeight: 20,
+    slug: '',
+    collection: null,
+    exercises: [],
+    loading: true,
+    page: 1,
+    pageSize: 30,
+    total: 0
+  },
+
+  onLoad(query) {
+    const slug = query.slug || '';
+    this.setData({ statusBarHeight: app.globalData.statusBarHeight || 20, slug });
+    this.load();
+  },
+
+  load() {
+    this.setData({ loading: true });
+    svc.getCollectionExercises(this.data.slug, {
+      page: this.data.page,
+      pageSize: this.data.pageSize
+    }).then((res) => {
+      this.setData({
+        collection: res.collection,
+        exercises: (res && res.items) || [],
+        total: (res && res.total) || 0,
+        loading: false
+      });
+    }).catch(() => {
+      this.setData({ loading: false });
+    });
+  },
+
+  onExercise(e) {
+    wx.navigateTo({ url: '/pages/detail/detail?id=' + encodeURIComponent(e.detail.id) });
+  }
+});