Function visitFunctions

* Walk the AST to find all function-like nodes (in document order). * For each, extract propsName and collect JSX elements from its body.

(
  node: Node,
  annotated: Set<number>,
  file: string,
  ignorePatterns: Array<string | RegExp>,
  offsetToLoc: (offset: number) => Loc,
  s: MagicString,
  code: string,
)