gallery: drop the four v0.2.0 playtest stills (Facility, Bunker 1, Silo, Bunker 2) — gallery is now all-v0.4.0 attract (12 shots); manifest + contact sheet refreshed; readme link count 16 -> 12

docs/img/shots/manifest.csv

@@ -1,13 +1,9 @@
 new_name,original,video_session,snapshot_time
 shot-01.jpg,v040/dam0.png,v0.4.0 attract pass 2026.09.28,
-shot-02.jpg,Build-pc 2026.09.13 - 16.05.44.10.mp4_snapshot_06.00.446.jpg,2026.09.13 - 16.05.44.10,06:00:446
 shot-03.jpg,v040/runway.png,v0.4.0 attract pass 2026.09.28,
 shot-04.jpg,v040/surface 1.png,v0.4.0 attract pass 2026.09.28,
-shot-06.jpg,Build-pc 2026.09.13 - 16.05.44.10.mp4_snapshot_11.03.430.jpg,2026.09.13 - 16.05.44.10,11:03:430
-shot-07.jpg,Build-pc 2026.09.13 - 16.54.07.12.mp4_snapshot_02.25.190.jpg,2026.09.13 - 16.54.07.12,02:25:190
 shot-09.jpg,v040/frigate 0.png,v0.4.0 attract pass 2026.09.28,
 shot-11.jpg,v040/surface 2.png,v0.4.0 attract pass 2026.09.28,
-shot-13.jpg,Build-pc 2026.09.13 - 16.54.07.12.mp4_snapshot_12.09.456.jpg,2026.09.13 - 16.54.07.12,12:09:456
 shot-16.jpg,v040/statue 0.png,v0.4.0 attract pass 2026.09.28,
 shot-20.jpg,v040/archives 0.png,v0.4.0 attract pass 2026.09.28,
 shot-21.jpg,v040/cradle 0.png,v0.4.0 attract pass 2026.09.28,