♻️ (builder) Remove barrel export and flatten folder arch

apps/builder/src/helpers/focusInput.ts

@@ -0,0 +1,12 @@
+type Props = {
+  at: number
+  input?: HTMLInputElement | HTMLTextAreaElement | null
+}
+
+export const focusInput = ({ at, input }: Props) => {
+  if (!input) return
+  input.focus()
+  setTimeout(() => {
+    input.selectionStart = input.selectionEnd = at
+  }, 100)
+}