feat(t3): add t3 example

t3/next.config.js

@@ -0,0 +1,10 @@
+/**
+ * Run `build` or `dev` with `SKIP_ENV_VALIDATION` to skip env validation. This is especially useful
+ * for Docker builds.
+ */
+await import("./src/env.js");
+
+/** @type {import("next").NextConfig} */
+const config = {};
+
+export default config;