made pom work with linux and fixed some file stuff for shaders

src/main/java/org/example/Game.java

@@ -100,7 +100,7 @@ public class Game
         glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
 
         // Add stuff to world
-        world.addEntity(new Entity("/obs/cube.obj", "/shaders/shader.fraq", "/shaders/shader.vert"));
+        world.addEntity(new Entity("/objs/cube.obj", "/shaders/shader.frag", "/shaders/shader.vert"));
 
         // Main loop or something
         while ( !glfwWindowShouldClose(window) )