[orx-parameters, orx-property-watchers, orx-file-watcher, orx-gui] Add @PathParameter, file watcher delegates and property delegates

orx-property-watchers/src/jvmDemo/kotlin/DemoImagePathWatcher01.kt

@@ -0,0 +1,33 @@
+import org.openrndr.application
+import org.openrndr.color.ColorRGBa
+import org.openrndr.draw.grayscale
+import org.openrndr.draw.tint
+import org.openrndr.drawImage
+import org.openrndr.extra.propertywatchers.watchingImagePath
+import org.openrndr.extra.propertywatchers.watchingProperty
+
+fun main() {
+    application {
+        program {
+            val state = object {
+                var path = "demo-data/images/image-001.png"
+                val image by watchingImagePath(::path) {
+                    drawImage(it.width, it.height) {
+                        drawer.drawStyle.colorMatrix = grayscale()
+                        drawer.image(it)
+                    }
+                }
+                val redImage by watchingProperty(::image, cleaner = { it.destroy() }) {
+                    drawImage(it.width, it.height) {
+                        drawer.drawStyle.colorMatrix = tint(ColorRGBa.RED)
+                        drawer.image(it)
+                    }
+                }
+            }
+
+            extend {
+                drawer.image(state.redImage)
+            }
+        }
+    }
+}