feat(v0.2): shturman-splash — Stage-0 splash (software-render → PNG)

P6.2: статичный брендовый splash-кадр (wordmark «Штурман» на тёмном),
render_splash через shturman-render; bin с --screenshot. Без чтения шины
(стартует до Power/Settings → «мгновенно»). Визуальные токены — каркас (язык v0.5).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Signed-off-by: Alexander <akotenev2003@gmail.com>

Cargo.lock

@@ -3642,6 +3642,19 @@ dependencies = [
  "tracing",
 ]
 
+[[package]]
+name = "shturman-splash"
+version = "0.0.0"
+dependencies = [
+ "anyhow",
+ "png 0.17.16",
+ "shturman-common",
+ "shturman-render",
+ "slint",
+ "tempfile",
+ "tracing",
+]
+
 [[package]]
 name = "signal-hook-registry"
 version = "1.4.8"