Initial commit: InTono — app KMP per l'apprendimento musicale

App Kotlin Multiplatform (Android/iOS/Desktop) con Compose Multiplatform:
controllo intonazione (YIN), pratica guidata, metronomo, ear training,
sfide, scansione spartiti via AI, spartiti bundled e pentagramma con
glifi tipografici, travature, battute e spaziatura proporzionale.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

desktopApp/src/desktopMain/kotlin/com/notemusicali/Main.kt

@@ -0,0 +1,29 @@
+package com.notemusicali
+
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Surface
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.unit.dp
+import androidx.compose.ui.window.Window
+import androidx.compose.ui.window.application
+import androidx.compose.ui.window.rememberWindowState
+import com.notemusicali.navigation.AppNavigation
+import com.notemusicali.ui.theme.NoteMusicaliTheme
+
+fun main() = application {
+    Window(
+        onCloseRequest = ::exitApplication,
+        title = "InTono",
+        state = rememberWindowState(width = 1024.dp, height = 768.dp),
+    ) {
+        NoteMusicaliTheme {
+            Surface(
+                modifier = Modifier.fillMaxSize(),
+                color = MaterialTheme.colorScheme.background,
+            ) {
+                AppNavigation()
+            }
+        }
+    }
+}