Enable loading fonts to GUI

api/src/main/java/com/bartlomiejpluta/base/api/game/gui/Font.java

@@ -0,0 +1,9 @@
+package com.bartlomiejpluta.base.api.game.gui;
+
+import java.nio.ByteBuffer;
+
+public interface Font {
+   String getName();
+
+   ByteBuffer getByteBuffer();
+}

api/src/main/java/com/bartlomiejpluta/base/api/game/gui/GUI.java

@@ -14,5 +14,11 @@ public interface GUI extends Renderable, Disposable {
 
    void fillColor(Color color);
 
+   void setFontFace(String fontUid);
+
+   void setFontSize(float size);
+
+   void putText(float x, float y, CharSequence text);
+
    Color createColor(float red, float green, float blue, float alpha);
 }