add readme 和注释

common_ui/src/main/ets/pages/Index.ets

@@ -0,0 +1,17 @@
+@Entry
+@Component
+struct Index {
+  @State message: string = 'Hello World';
+
+  build() {
+    Row() {
+      Column() {
+        Text(this.message)
+          .fontSize(50)
+          .fontWeight(FontWeight.Bold)
+      }
+      .width('100%')
+    }
+    .height('100%')
+  }
+}

common_ui/src/main/ets/utils/Calc.ets

@@ -0,0 +1,3 @@
+export function add(a:number, b:number) {
+    return a + b;
+}

common_ui/src/main/module.json5

@@ -0,0 +1,14 @@
+{
+  "module": {
+    "name": "common_ui",
+    "type": "shared",
+    "description": "$string:shared_desc",
+    "deviceTypes": [
+      "phone",
+      "tablet",
+      "2in1"
+    ],
+    "deliveryWithInstall": true,
+    "pages": "$profile:main_pages"
+  }
+}

common_ui/src/main/resources/base/element/color.json

@@ -0,0 +1,8 @@
+{
+  "color": [
+    {
+      "name": "white",
+      "value": "#FFFFFF"
+    }
+  ]
+}

common_ui/src/main/resources/base/element/string.json

@@ -0,0 +1,8 @@
+{
+  "string": [
+    {
+      "name": "shared_desc",
+      "value": "description"
+    }
+  ]
+}

common_ui/src/main/resources/base/profile/main_pages.json

@@ -0,0 +1,5 @@
+{
+  "src": [
+    "pages/Index"
+  ]
+}