docs: update api-reference project for v2 (#7307)

* remove everything v1 and make v2 default

* move main v2 rewrites to book

* move rewrites to book + other fixes

www/apps/user-guide/next.config.mjs

@@ -46,7 +46,7 @@ const withMDX = mdx({
                 process.env.VERCEL_ENV !== "production"
                   ? process.env.NEXT_PUBLIC_API_URL
                   : undefined,
-              path: "api",
+              path: "v2/api",
             },
           },
         },

www/apps/user-guide/utils/base-path-url.ts

@@ -1,3 +1,5 @@
+import { getLinkWithBasePath } from "docs-ui"
+
 export function basePathUrl(path = "") {
-  return `${process.env.NEXT_PUBLIC_BASE_PATH}${path}`
+  return getLinkWithBasePath(path, process.env.NEXT_PUBLIC_BASE_PATH)
 }