added macos & linux run script for convenience. verified blank GUI launches correctly

src/run.ps1

@@ -1,3 +1,14 @@
-javac *.java
+function Run {
-java App -c
+    param(
-rm *.class
+        [string]$flag
+    )
+    javac *.java
+    java App $flag
+    rm *.class
+}
+
+if ($args.Length -eq 1) {
+    $flag = $args[0]
+}
+
+Run $flag

src/run.sh

@@ -0,0 +1,11 @@
+run() {
+    javac *.java
+    java App $1
+    rm *.class
+}
+
+if($# -eq 1) then
+    FLAG=$1
+fi
+
+run $FLAG