Add Linux packaging plugin and configure Debian dependencies

Introduced the `io.github.kdroidfilter.compose.linux.packagedeps` plugin to handle Linux packaging. Added `linuxDebConfig` for specifying `startupWMClass` and Debian dependencies (`libqt5widgets5t64`) to streamline Linux distribution.

Author: kdroidFilter

demo/build.gradle.kts

@@ -5,6 +5,7 @@ plugins {
     alias(libs.plugins.multiplatform)
     alias(libs.plugins.compose.compiler)
     alias(libs.plugins.compose)
+    id("io.github.kdroidfilter.compose.linux.packagedeps") version "0.1.0"
 }
 
 kotlin {
@@ -63,3 +64,9 @@ tasks.register("buildAndRunDemo") {
     description = "Builds the native libraries and then runs the demo application"
     group = "application"
 }
+
+linuxDebConfig {
+    startupWMClass.set("com.kdroid.composetray.demo.DynamicTrayMenuKt")
+    debDepends.set(listOf("libqt5widgets5t64"))
+
+}