v0.5.0

Added

• Added renforge_hover_element to move the pointer over visible controls
  without clicking, with stale-frame protection.
• Added renforge_capture_screenshot for reusable named PNG captures and
  renforge_estimate_translation for measuring visual movement between them.
• Added renforge_get_ui_element_bounds to report focus bounds and the
  alpha-painted bounds of the active ImageButton state.

Changed

• ImageButton hover now dispatches Ren'Py's focus mouse handler before
  restarting the interaction, so hover state updates reliably without a player
  interaction loop.