docs: add ZexiLee as a contributor for code, and example (#54)

* docs: update README.md

* docs: update README_zh.md

* docs: update .all-contributorsrc

---------

Co-authored-by: allcontributors[bot] <46447321+allcontributors[bot]@users.noreply.github.com>

.all-contributorsrc

@@ -132,6 +132,16 @@
         "code",
         "example"
       ]
+    },
+    {
+      "login": "ZexiLee",
+      "name": "Zexi Li",
+      "avatar_url": "https://avatars.githubusercontent.com/u/49397774?v=4",
+      "profile": "https://github.com/ZexiLee",
+      "contributions": [
+        "code",
+        "example"
+      ]
     }
   ],
   "contributorsPerLine": 7,