fix: refuse abbreviated flags in every script

argparse completed a prefix into the only flag starting with it:
slots.py --emulator read profiles from a directory named after the
emulator and reported nothing, and pipeline.py --all built every pack
variant. Every parser now refuses an abbreviation.

scripts/dedup.py

@@ -313,7 +313,7 @@ def deduplicate(bios_dir: str, dry_run: bool = False) -> dict:
 
 
 def main() -> None:
-    parser = argparse.ArgumentParser(description="Deduplicate bios/ directory")
+    parser = argparse.ArgumentParser(allow_abbrev=False, description="Deduplicate bios/ directory")
     parser.add_argument(
         "--dry-run", action="store_true", help="Preview without deleting"
     )