chore(nx/server): move source code

apps/server/src/errors/validation_error.ts

@@ -0,0 +1,12 @@
+import HttpError from "./http_error.js";
+
+class ValidationError extends HttpError {
+
+    constructor(message: string) {
+        super(message, 400)
+        this.name = "ValidationError";
+    }
+
+}
+
+export default ValidationError;