refactor: Restructure source code folder

This way the location of certain classes should make more sense

src/http/input/RequestParser.ts

@@ -0,0 +1,8 @@
+import type { HttpRequest } from '../../server/HttpRequest';
+import { AsyncHandler } from '../../util/handlers/AsyncHandler';
+import type { Operation } from '../Operation';
+
+/**
+ * Converts an incoming HttpRequest to an Operation.
+ */
+export abstract class RequestParser extends AsyncHandler<HttpRequest, Operation> {}