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/search/search.js

@@ -0,0 +1,48 @@
+const app = getApp();
+const svc = require('../../services/exercise');
+
+Page({
+  data: {
+    statusBarHeight: 20,
+    q: '',
+    results: [],
+    loading: false,
+    searched: false
+  },
+
+  onLoad() {
+    this.setData({ statusBarHeight: app.globalData.statusBarHeight || 20 });
+  },
+
+  onInput(e) {
+    const q = e.detail.value;
+    this.setData({ q });
+    this.debouncedSearch(q);
+  },
+
+  debouncedSearch(q) {
+    if (this._timer) clearTimeout(this._timer);
+    this._timer = setTimeout(() => this.doSearch(q), 350);
+  },
+
+  doSearch(q) {
+    if (!q || !q.trim()) {
+      this.setData({ results: [], searched: false, loading: false });
+      return;
+    }
+    this.setData({ loading: true });
+    svc.search(q.trim()).then((res) => {
+      this.setData({
+        results: (res && res.items) || [],
+        searched: true,
+        loading: false
+      });
+    }).catch(() => {
+      this.setData({ searched: true, loading: false });
+    });
+  },
+
+  onExercise(e) {
+    wx.navigateTo({ url: '/pages/detail/detail?id=' + encodeURIComponent(e.detail.id) });
+  }
+});