Fix wiki video embeds: use clickable YouTube thumbnails.
Add assembly and software setup video walkthroughs.
Sync wiki with FlightScnr_Pi 2026.8.21.2; add image placeholders.
Fixing wiki link order so Assembly and other aliases resolve.
Nest Hardware Assembly under Hardware; sync Credits & License from main.
Document dual MakerWorld enclosure profiles and USB speaker.
Sync wiki with FlightScnr_Pi main (2026.8.5.4); rename Installation to Software Setup.