v0.3.3

Added

• Show the current search match ordinal and lazy total in the viewer footer,
  using a + suffix while the count is still based on the currently indexed
  portion of the file.
• Add a viewer mouse-selection mode toggle with m, so users can temporarily
  release mouse capture and hide the frame and line-number gutter for native
  terminal text selection, then press m again to restore wheel and trackpad
  handling.