feat(symfony-console): implement interactive question/style helpers

Resolve the remaining todo!()s in SymfonyStyle, OutputStyle,
QuestionHelper and SymfonyQuestionHelper:

* Wire up the virtual dispatch PHP performs for the protected
  writePrompt()/writeError() overrides, following the codebase's
  established inheritance idiom (Command, ArchiveDownloader): the base
  class becomes a trait (QuestionHelperInterface, named after the
  QuestionInterface precedent) whose provided methods ask/do_ask/
  validate_attempts carry the template logic and late-bind the
  write_prompt/write_error hooks through Self, with inner()/inner_mut()
  reaching the base-class state. SymfonyQuestionHelper overrides the
  hooks as plain trait-impl methods, mirroring PHP's protected-method
  overriding, so SymfonyStyle-driven questions now render the Symfony
  Style Guide prompt.
* Type definition_list input as an enum (string|array|TableSeparator)
  because PhpMixed intentionally cannot carry objects; the
  InvalidArgumentException branch (a LogicException) becomes
  unrepresentable. horizontal_table now takes typed Cells/Rows.
* Propagate the MissingInputException thrown inside autocomplete()
  through a Result instead of aborting.
* Implement as_console_output_interface via Ref::filter_map on
  ConsoleOutput, the interface's only implementor.
* Port progressIterate eagerly, following ProgressBar::iterate.
* Map __FILE__ to current_exe(): a native binary never runs from a
  phar, so the hiddeninput.exe relocation branch correctly never fires.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

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