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/build.gradle.kts

@@ -0,0 +1,52 @@
+plugins {
+    alias(libs.plugins.kotlin.multiplatform)
+    alias(libs.plugins.compose.multiplatform)
+    alias(libs.plugins.kotlin.compose)
+}
+
+kotlin {
+    jvm("desktop") {
+        compilations.all {
+            kotlinOptions {
+                jvmTarget = "17"
+            }
+        }
+    }
+
+    sourceSets {
+        val desktopMain by getting {
+            dependencies {
+                implementation(project(":shared"))
+                implementation(compose.desktop.currentOs)
+                implementation(compose.material3)
+                implementation(compose.foundation)
+                implementation(compose.runtime)
+            }
+        }
+    }
+}
+
+compose.desktop {
+    application {
+        mainClass = "com.notemusicali.MainKt"
+
+        nativeDistributions {
+            targetFormats(
+                org.jetbrains.compose.desktop.application.dsl.TargetFormat.Dmg,
+                org.jetbrains.compose.desktop.application.dsl.TargetFormat.Msi,
+                org.jetbrains.compose.desktop.application.dsl.TargetFormat.Deb,
+            )
+            packageName = "InTono"
+            packageVersion = "1.0.0"
+
+            macOS {
+                infoPlist {
+                    extraKeysRawXml = """
+                        <key>NSMicrophoneUsageDescription</key>
+                        <string>InTono ha bisogno del microfono per rilevare le note musicali suonate</string>
+                    """
+                }
+            }
+        }
+    }
+}

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()
+            }
+        }
+    }
+}