docs: convert examples to typescript (#3766)

* docs: convert examples to typescript

* docs: convert remaining examples

* docs: update next.js

* ci: fix lint

* docs: fix next.js path

* docs: cleanup

* update

Co-authored-by: wendellhu <wendellhu@tencent.com>

site/pages/api/index.ts

@@ -0,0 +1,11 @@
+import { readdirSync } from 'fs'
+import { join } from 'path'
+
+const examplePath = join(process.cwd(), 'examples')
+
+export function getAllExamples() {
+  const slugs = readdirSync(examplePath)
+  return slugs
+    .filter(name => name.match(/.tsx$/))
+    .map(n => n.replace(/.tsx$/, ''))
+}