Initial support for compose multiplatform

Signed-off-by: Aayush Gupta <aayushgupta219@gmail.com>

desktopApp/build.gradle.kts

@@ -0,0 +1,32 @@
+/*
+ * SPDX-FileCopyrightText: 2026 NewPipe e.V. <https://newpipe-ev.de>
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
+import org.jetbrains.compose.desktop.application.dsl.TargetFormat
+
+plugins {
+    alias(libs.plugins.jetbrains.kotlin.jvm)
+    alias(libs.plugins.jetbrains.kotlin.compose)
+    alias(libs.plugins.jetbrains.compose.multiplatform)
+}
+
+dependencies {
+    implementation(projects.shared)
+
+    implementation(compose.desktop.currentOs)
+    implementation(libs.jetbrains.coroutines.swing)
+    implementation(libs.jetbrains.compose.preview)
+}
+
+compose.desktop {
+    application {
+        mainClass = "net.newpipe.app.MainKt"
+
+        nativeDistributions {
+            targetFormats(TargetFormat.Dmg, TargetFormat.Msi, TargetFormat.Deb)
+            packageName = "net.newpipe.app"
+            packageVersion = "1.0.0"
+        }
+    }
+}

desktopApp/src/main/kotlin/net/newpipe/app/Main.kt

@@ -0,0 +1,18 @@
+/*
+ * SPDX-FileCopyrightText: 2026 NewPipe e.V. <https://newpipe-ev.de>
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
+package net.newpipe.app
+
+import androidx.compose.ui.window.Window
+import androidx.compose.ui.window.application
+
+/**
+ * Entry point for compose-related UI components on Desktop
+ */
+fun main() = application {
+    Window(onCloseRequest = ::exitApplication, title = "NewPipe") {
+        App()
+    }
+}