RastaConverter1.0-RC12

• Release packages are now self-contained builds on Linux, macOS and Windows.
  FreeImage, SDL3, SDL3_ttf and their third-party dependencies are linked
  statically, so users no longer need SDL3 or FreeImage installed.
• Fixed Continue/Resume losing backslashes from quoted Windows details-mask
  paths. Saved recipes now round-trip spaces, quotes, backslashes, Unicode and
  control characters, while remaining compatible with recipes written by
  affected older versions.
• Made recipe updates and relocated snapshot paths operate on parsed options
  instead of raw text, preventing output, details-mask and target paths from
  being corrupted when a run is continued or edited.
• Reworked portable path handling throughout the Live UI, Recent Conversions,
  XEX building and ANTIC 4 exports. Native Windows drive and UNC paths are
  handled correctly, while POSIX filenames may contain literal backslashes.
• Added regression tests for Windows and POSIX recipe paths, snapshot
  relocation, empty and escaped arguments, Unicode path joins and the original
  reported details-mask path.