Initial commit: VesiscanBasic Android app

Port of MedilightV2 iOS app to Android with Kotlin + Jetpack Compose.
Includes BLE connectivity, NIRS/Piezo sensor modes, Rive animations,
interactive measurement history charts, and foldable device support.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

.gitignore

@@ -0,0 +1,11 @@
+*.iml
+.gradle
+/local.properties
+/.idea/
+.DS_Store
+/build
+/captures
+.externalNativeBuild
+.cxx
+local.properties
+app/build/