docs: add forms guide (#3822)

Author: ryo-manba

apps/docs/components/docs/toc.tsx

@@ -19,7 +19,7 @@ const paddingLeftByLevel: Record<number, string> = {
   1: "pl-0",
   2: "pl-0",
   3: "pl-3",
-  4: "pl-3",
+  4: "pl-6",
 };
 
 export const DocsToc: FC<DocsTocProps> = ({headings}) => {

apps/docs/config/routes.json

@@ -37,6 +37,12 @@
           "keywords": "client side routing, routing, browser routing, nextui, next.js router, react router, remix router",
           "path": "/docs/guide/routing.mdx"
         },
+        {
+          "key": "form",
+          "title": "Forms",
+          "keywords": "forms, form validation, nextui",
+          "path": "/docs/guide/form.mdx"
+        },
         {
           "key": "upgrade-to-v2",
           "title": "Upgrade to v2",