Add Still Alive photo; keep spaces between split lyric pieces

The source page splits some lines into several spans; a browser renders the
whitespace between them as a space, which the importer dropped ("becausewe").
It now adds that space. Regenerated imported.h.

Add a photo of the demo on the panel to the README.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

README.md

@@ -91,6 +91,8 @@ pio device monitor
 
 ## Still Alive demo
 
+![Still Alive demo running on the EL512.256-H](docs/images/still_alive.jpg)
+
 A recreation of Portal's ending: timed song text typed into a console on the
 left, credits scrolling top right, ASCII art bottom right. The text, timing, art
 and credits in `src/still_alive/imported.h` come from