feat: setup openapi libs for landing

apps/landing/src/lib/fetcher.ts

@@ -0,0 +1,6 @@
+import type { paths } from '@/openapi-types';
+import createClient from 'openapi-fetch';
+
+export const fetcher = createClient<paths>({
+  baseUrl: process.env.NEXT_PUBLIC_API_URL ?? 'https://api.imphnen.dev',
+});

apps/landing/src/lib/rpc.ts

@@ -0,0 +1,8 @@
+import type { paths } from '@/openapi-types';
+import createFetchClient from 'openapi-fetch';
+import createClient from 'openapi-react-query';
+
+const fetchClient = createFetchClient<paths>({
+  baseUrl: process.env.NEXT_PUBLIC_API_URL ?? 'https://api.imphnen.dev',
+});
+export const rpc = createClient(fetchClient);