Add optimized multi-platform release CI/CD pipeline.

Split Windows builds into shared x64 prep and arch-specific packaging, add comprehensive caching, verification scripts, and a PR smoke workflow.

Co-authored-by: Cursor <cursoragent@cursor.com>

scripts/ci-test-compile.sh

@@ -0,0 +1,11 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+./gradlew \
+  :app:shared:compileKotlinJvm \
+  :utils:shared:compileKotlinJvm \
+  :app:desktop:compileKotlin \
+  :app:shared:compileAndroidMain \
+  :app:android:compileReleaseKotlin \
+  --no-daemon \
+  --console=plain