main: options-first CLI with --help, and wire up display/boot flags

- Rewrite argument handling: the ROM is now the final argument and options
  precede it (parsed in argv[1..argc-2] so optional-value flags never swallow
  the ROM). Add grouped --help/-h, unknown-option errors, and clear 'missing
  value'/'no ROM' diagnostics.
- Add --chrome, --palette/--green, and --bios flags; set the display/capture
  options before the --shot and recording paths so screenshots and recordings
  honor them. Make --shot dump the composited capture frame.
- gbctl: pass the ROM last when spawning the emulator.
- gitignore the (copyrighted) bios/ directory; document all new flags.

1 files changed, 1 insertions, 1 deletions

diff --git a/gbctl b/gbctl
index 287b16a..b926461 100755
--- a/gbctl
+++ b/gbctl
@@ -200,7 +200,7 @@ def cmd_spawn(argv):
     if "TMUX" not in os.environ:
         die("not inside tmux; gbctl spawn needs a tmux session")
 
-    cmd = [BIN, rom, "--sock", sock_path] + emu_args
+    cmd = [BIN, "--sock", sock_path] + emu_args + [rom]   # ROM is the final arg
     # exec via a shell wrapper so the pane stays around & shows a title
     shell_cmd = "printf '\\033]2;gbc %s\\007'; exec %s" % (
         os.path.basename(rom), " ".join(_shquote(c) for c in cmd))