refactor: 🚚 Organize code into sub-packages, instead of a single large package

packages/api/middlewares/boundary-check.ts

@@ -0,0 +1,20 @@
+import { ApiError } from "@versia/kit";
+import { createMiddleware } from "hono/factory";
+
+export const boundaryCheck = createMiddleware(async (context, next) => {
+    // Checks that FormData boundary is present
+    const contentType = context.req.header("content-type");
+
+    if (
+        contentType?.includes("multipart/form-data") &&
+        !contentType.includes("boundary")
+    ) {
+        throw new ApiError(
+            400,
+            "Missing FormData boundary",
+            "You are sending a request with a multipart/form-data content type but without a boundary. Please include a boundary in the Content-Type header. For more information, visit https://stackoverflow.com/questions/3508338/what-is-the-boundary-in-multipart-form-data",
+        );
+    }
+
+    await next();
+});