Beautiful theme switch

package-lock.json

@@ -10,6 +10,7 @@
         "color": "^4.2.3",
         "highlight.js": "^11.5.1",
         "next": "12.1.0",
+        "next-themes": "^0.2.1",
         "node-fetch": "^3.2.0",
         "phosphor-react": "^1.3.1",
         "react": "17.0.2",
@@ -3075,6 +3076,16 @@
         }
       }
     },
+    "node_modules/next-themes": {
+      "version": "0.2.1",
+      "resolved": "https://registry.npmjs.org/next-themes/-/next-themes-0.2.1.tgz",
+      "integrity": "sha512-B+AKNfYNIzh0vqQQKqQItTS8evEouKD7H5Hj3kmuPERwddR2TxvDSFZuTj6T7Jfn1oyeUyJMydPl1Bkxkh0W7A==",
+      "peerDependencies": {
+        "next": "*",
+        "react": "*",
+        "react-dom": "*"
+      }
+    },
     "node_modules/node-domexception": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/node-domexception/-/node-domexception-1.0.0.tgz",
@@ -6708,6 +6719,12 @@
         "use-subscription": "1.5.1"
       }
     },
+    "next-themes": {
+      "version": "0.2.1",
+      "resolved": "https://registry.npmjs.org/next-themes/-/next-themes-0.2.1.tgz",
+      "integrity": "sha512-B+AKNfYNIzh0vqQQKqQItTS8evEouKD7H5Hj3kmuPERwddR2TxvDSFZuTj6T7Jfn1oyeUyJMydPl1Bkxkh0W7A==",
+      "requires": {}
+    },
     "node-domexception": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/node-domexception/-/node-domexception-1.0.0.tgz",