[improvement] rename packages dir to src (#3659)

src/cell-group/index.less

@@ -0,0 +1,12 @@
+@import '../style/var';
+
+.van-cell-group {
+  background-color: @cell-group-background-color;
+
+  &__title {
+    padding: @cell-group-title-padding;
+    color: @cell-group-title-color;
+    font-size: @cell-group-title-font-size;
+    line-height: @cell-group-title-line-height;
+  }
+}

src/cell-group/index.tsx

@@ -0,0 +1,50 @@
+import { createNamespace } from '../utils';
+import { inherit } from '../utils/functional';
+
+// Types
+import { CreateElement, RenderContext } from 'vue/types';
+import { DefaultSlots } from '../utils/types';
+
+export type CellGroupProps = {
+  title?: string;
+  border: boolean
+};
+
+const [createComponent, bem] = createNamespace('cell-group');
+
+function CellGroup(
+  h: CreateElement,
+  props: CellGroupProps,
+  slots: DefaultSlots,
+  ctx: RenderContext<CellGroupProps>
+) {
+  const Group = (
+    <div
+      class={[bem(), { 'van-hairline--top-bottom': props.border }]}
+      {...inherit(ctx, true)}
+    >
+      {slots.default && slots.default()}
+    </div>
+  );
+
+  if (props.title) {
+    return (
+      <div>
+        <div class={bem('title')}>{props.title}</div>
+        {Group}
+      </div>
+    );
+  }
+
+  return Group;
+}
+
+CellGroup.props = {
+  title: String,
+  border: {
+    type: Boolean,
+    default: true
+  }
+};
+
+export default createComponent<CellGroupProps>(CellGroup);