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/components/chip/index.js

@@ -0,0 +1,16 @@
+Component({
+  properties: {
+    label: { type: String, value: '' },
+    active: { type: Boolean, value: false },
+    color: { type: String, value: '' },
+    value: { type: String, value: '' }
+  },
+  methods: {
+    onTap() {
+      this.triggerEvent('tap', {
+        value: this.data.value,
+        label: this.data.label
+      });
+    }
+  }
+});