refactor(lib): organize modules by feature

app/form/client.tsx

@@ -55,8 +55,8 @@ import {
 import { Spinner } from "@/components/ui/spinner";
 import {
   type FormAnswerValue,
-} from "@/lib/form-answer-values";
-import { isImageOnlyResponse } from "@/lib/question-response-type";
+} from "@/lib/form/form-answer-values";
+import { isImageOnlyResponse } from "@/lib/form/question-response-type";
 import {
   buildFormSchema,
   parseStoredDraft,
@@ -64,7 +64,7 @@ import {
   type FormFillerClientProps,
   type FormValues,
   type StoredDraft,
-} from "@/lib/form-client";
+} from "@/lib/form/form-client";
 
 export function FormLayoutClient({
   userName,