Games App: Asteroids, and Pong by tilting

Asteroids is the sixth Game: lean the device to turn, ; for thrust, .
to fire, the arrows too for a device on a table. In Pong, 0 switches
between the keys and tilting and 9 turns the tilt round, both
remembered. Both read the accelerometer through the same smoothing, and
take however the device is held at the start as the middle.

Played on the device: the default way of Pong's tilt was swapped after
trying it.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_0162FokPdvY2KsS4NBfwyWPk

src/ui/icons.h

@@ -8,6 +8,7 @@ namespace roro::icons {
 // One bit a pixel, the leftmost first, a row after another: what Canvas::drawBitmap takes.
 constexpr int kSize = 32;
 
+extern const uint8_t asteroids[128];  // asteroids.png
 extern const uint8_t games[128];  // games.png
 extern const uint8_t gemini[128];  // gemini.png
 extern const uint8_t gnss[128];  // gnss.png