fix: Handle running CLI in headless environment (MorpheApp#95)

Author: prateek-who

src/main/kotlin/app/morphe/MorpheLauncher.kt

@@ -6,12 +6,19 @@
 package app.morphe
 
 import app.morphe.library.logging.Logger
+import java.awt.GraphicsEnvironment
 
 fun main(args: Array<String>) {
-    if (args.isEmpty()) {
+    if (args.isEmpty() && !GraphicsEnvironment.isHeadless()) {
         app.morphe.gui.launchGui(args)
     } else {
         Logger.setDefault()
+
+        if (GraphicsEnvironment.isHeadless()){
+            val logger = java.util.logging.Logger.getLogger("app.morphe.MorpheLauncher")
+            logger.info("Running in Headless environment, falling back to CLI mode.")
+        }
+
         picocli.CommandLine(app.morphe.cli.command.MainCommand)
             .execute(*args)
             .let(System::exit)