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

orx-property-watchers/src/jvmDemo/kotlin/DemoPropertyWatchers01.kt

@@ -0,0 +1,22 @@
+import org.openrndr.application
+import org.openrndr.extra.propertywatchers.watchingProperty
+
+fun main() {
+    application {
+        program {
+            val state = object {
+                val x by watchingProperty(mouse::position) {
+                    it.x
+                }
+
+                val xx by watchingProperty(::x) {
+                    it * it
+                }
+            }
+
+            extend {
+                state.x
+            }
+        }
+    }
+}