[orx-noise] Tidy up demos

Produce 720px wide images.
Use main() = application { for reduced indentation

orx-noise/src/jvmDemo/kotlin/hammersley/DemoHammersley2D01.kt

@@ -10,20 +10,18 @@ import org.openrndr.extra.noise.hammersley.hammersley2D
  * 400 2D Hammersley points mapped within the bounds of the application's resolution.
  * These points are visualized by rendering circles at their respective positions.
  */
-fun main() {
-    application {
-        configure {
-            width = 720
-            height = 720
-        }
+fun main() = application {
+    configure {
+        width = 720
+        height = 720
+    }
 
-        program {
-            extend {
-                val points = (0 until 400).map {
-                    hammersley2D(it, 400) * 720.0
-                }
-                drawer.circles(points, 5.0)
+    program {
+        extend {
+            val points = (0 until 400).map {
+                hammersley2D(it, 400) * 720.0
             }
+            drawer.circles(points, 5.0)
         }
     }
-}
+}