[orx-hash-grid] Add documentation, demos and improve API

orx-hash-grid/build.gradle.kts

@@ -15,5 +15,15 @@ kotlin {
                 implementation(libs.kotlin.reflect)
             }
         }
+
+        @Suppress("UNUSED_VARIABLE")
+        val jvmDemo by getting {
+            dependencies {
+                implementation(project(":orx-color"))
+                implementation(project(":orx-fx"))
+                implementation(project(":orx-noise"))
+            }
+        }
+
     }
 }