docs: add vercel analytics

pnpm-lock.yaml

@@ -55,6 +55,7 @@ importers:
       vite-plugin-windicss: ^1.8.8
       vitepress: ^1.0.0-alpha.4
       vue: ^3.2.37
+      web-vitals: ^3.0.4
       windicss: ^3.5.6
     dependencies:
       '@algolia/client-search': 4.14.2
@@ -68,6 +69,7 @@ importers:
       canvas-confetti: 1.6.0
       vite: 2.9.15
       vue: 3.2.37
+      web-vitals: 3.0.4
     devDependencies:
       '@iconify/json': 2.1.95
       '@types/canvas-confetti': 1.4.3
@@ -10823,6 +10825,10 @@ packages:
     engines: {node: '>= 8'}
     dev: true
 
+  /web-vitals/3.0.4:
+    resolution: {integrity: sha512-Yau8qf1AJ/dm6MY180Bi0qpCIuWmAfKAnOqmxLecGfIHn0+ND3H4JOhXeY73Pyi9zjSF5J4SNUewHLNUzU7mmA==}
+    dev: false
+
   /webidl-conversions/3.0.1:
     resolution: {integrity: sha512-2JAn3z8AR6rjK8Sm8orRC0h/bcl/DqL7tRPdGZ4I1CjdF+EaMLmYxBHyXuKL849eucPFhvBoxMsflfOb8kxaeQ==}
     dev: true