chore: include resources in jar

Loads images as project resources instead
of loading them as files. This makes it possible
to include them in jar file. Doing so will solve
problem with absent images (previously
they weren't found in the runtime)

src/main/scala/gui/Gui.scala

@@ -61,8 +61,8 @@ class Gui(app: JFXApp3, engine: Engine, appName: String, numOfBlocks: Int = 4) {
   private val LabelGridGap = 25
   private val LabelMaxChars = 6
   private val ChoiceGroupsOpacity = 0.35
-  private val ArrowsImagePath = "resources/images/arrows.png"
-  private val LogoImagePath = "resources/images/logo.png"
+  private val ArrowsImagePath = "/images/arrows.png"
+  private val LogoImagePath = "/images/logo.png"
 
   private var BlockList: IndexedSeq[Node] = null
   private var MainButton: Circle = null
@@ -82,7 +82,7 @@ class Gui(app: JFXApp3, engine: Engine, appName: String, numOfBlocks: Int = 4) {
       alwaysOnTop = true
     }
     app.stage.centerOnScreen()
-    app.stage.icons += new Image(new File(LogoImagePath).toURI.toString)
+    app.stage.icons += new Image(classOf[Gui].getResourceAsStream(LogoImagePath)) //new Image(new File(LogoImagePath).toURI.toString)
   }
 
   private def createScene(): Scene = {
@@ -143,7 +143,7 @@ class Gui(app: JFXApp3, engine: Engine, appName: String, numOfBlocks: Int = 4) {
     selectedChoicesGrid.setMouseTransparent(true)
 
     // Create layer for direction indicators
-    ArrowsImage = Option(new ImageView(new Image(new File(ArrowsImagePath).toURI.toString)))
+    ArrowsImage = Option(new ImageView(new Image(classOf[Gui].getResourceAsStream(ArrowsImagePath))))
     ArrowsImage.get.setMouseTransparent(true)
     ArrowsImage.get.visible = false