Initial support for compose multiplatform

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

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()
+    }
+}