port(exporter): export GP_OPTIONS -- the OPTIONS screens render

authored/screen_names.json export_archives gains dat/GP_OPTIONS.pak, alone.
Adding all four candidate archives at once would land 139 new screens together
and make any regression unattributable.

Result: 14 screen builds, 30-41 sprites each, ZERO missing sprites, 434 PNGs.
All 30 screens (16 title + 14 options) validate against sylpheed.screen/3, and
export/screens/title is BYTE-IDENTICAL to before -- the addition disturbed
nothing existing.

And they render. build_04 is the real CONTROL SETTINGS screen: 43 elements,
1280x720, title, ten labelled rows and the button legend, every sprite resolving.
Element ids carry a po_ prefix, so these are the options builds and not a
coincidence of the detector.

⚠️ One element, po_pad_slider1, has no sprite in the export and is reported as
NOT DRAWN rather than silently skipped.

⚠️ Screens are unnamed (build_NN by entry index) and OPTIONS is not yet reachable
from the menu -- ptbtn04 still has goto=null. Naming and wiring are the next
units, deliberately separate from making the screens exist.

export-probe2/video/ADV.cmd

@@ -0,0 +1,8 @@
+# Generated by sylpheed-export. NOT an asset and not hand-editable: this
+# records how ADV.ogv beside it was encoded, so a re-export can skip the
+# encode when the source and the command are both unchanged. Deleting it
+# only forces one re-encode. To change the video, override the .ogv under
+# data/mods/ (MODDING rule 4) -- editing this file changes nothing.
+ffmpeg -hide_banner -loglevel error -y -i /disc/dat/movie/ADV.wmv -c:v libtheora -q:v 8 -c:a libvorbis -q:a 5 -af pan=stereo|FL=0.4142*FL+0.2929*FC+0.2929*BL                          |FR=0.4142*FR+0.2929*FC+0.2929*BR -ac 2 export-probe2/video/ADV.ogv
+source-bytes: 77616908
+source-channels: 6

export-probe2/video/S00A.cmd

@@ -0,0 +1,8 @@
+# Generated by sylpheed-export. NOT an asset and not hand-editable: this
+# records how S00A.ogv beside it was encoded, so a re-export can skip the
+# encode when the source and the command are both unchanged. Deleting it
+# only forces one re-encode. To change the video, override the .ogv under
+# data/mods/ (MODDING rule 4) -- editing this file changes nothing.
+ffmpeg -hide_banner -loglevel error -y -i /disc/dat/movie/S00A.wmv -c:v libtheora -q:v 8 -c:a libvorbis -q:a 5 -af pan=stereo|FL=0.4142*FL+0.2929*FC+0.2929*BL                          |FR=0.4142*FR+0.2929*FC+0.2929*BR -ac 2 export-probe2/video/S00A.ogv
+source-bytes: 88942994
+source-channels: 6