feat(docs): update quick start page and add reference section

docs/lib/merge-refs.ts

@@ -0,0 +1,15 @@
+import type * as React from 'react';
+
+export function mergeRefs<T>(
+  ...refs: (React.Ref<T> | undefined)[]
+): React.RefCallback<T> {
+  return (value) => {
+    refs.forEach((ref) => {
+      if (typeof ref === 'function') {
+        ref(value);
+      } else if (ref) {
+        ref.current = value;
+      }
+    });
+  };
+}