feat: 添加地图demo

examples/other/map/demo/map.js

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+import F2 from '@antv/f2';
+import '@antv/data-set';
+const DataSet = window.DataSet;
+
+fetch('https://gw.alipayobjects.com/os/antvdemo/assets/data/china-provinces.geo.json')
+  .then(res => res.json())
+  .then(GeoJSON => {
+    const geoDv = new DataSet.View().source(GeoJSON, {
+      type: 'GeoJSON'
+    });
+
+    const chart = new F2.Chart({
+      id: 'container',
+      padding: 0,
+      pixelRatio: window.devicePixelRatio
+    });
+    chart.legend(false);
+    chart.axis(false);
+    chart.tooltip(false);
+
+    chart.source(geoDv.rows);
+    chart.polygon()
+      .position('longitude*latitude')
+      .color('grey')
+      .style({
+        // opacity: 0.3
+      });
+
+    chart.render();
+  });

examples/other/map/demo/meta.json

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+{
+  "title": {
+    "zh": "中文分类",
+    "en": "Category"
+  },
+  "demos": [
+    {
+      "filename": "map.js",
+      "title": "地图",
+      "screenshot": "https://gw.alipayobjects.com/zos/finxbff/compress-tinypng/51d3f37a-d0ab-47d8-9037-d8fb7791f497.png"
+    }
+  ]
+}

examples/other/map/index.en.md

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+---
+title: Map
+order: 1
+---
+

examples/other/map/index.zh.md

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+---
+title: 地图
+order: 1
+---
+