Add Gluon platform entry (#68)

Author: Copilot

gluon.md

@@ -0,0 +1,49 @@
+---
+name: Gluon
+status: Production-ready, Commercial & Open Source
+javaVersion: 17+ (21+ recommended)
+learningCurve: Moderate
+lastRelease: Scene Builder 25.0.0 (September 2025)
+learnMoreText: Gluon Official Website
+learnMoreHref: https://gluonhq.com/
+image: images/ui-gluonhq.png
+tags:
+    - Desktop UI
+    - Mobile
+    - Build Tools
+dateAdded: 2026-02-25
+---
+
+Gluon is a Java-focused company and platform that co-leads the OpenJFX project and provides a suite of commercial and open-source tools for building cross-platform JavaFX applications. Their flagship open-source product, Scene Builder, is a drag-and-drop visual designer for FXML-based JavaFX UIs, enabling rapid interface design with clear separation between design and application logic. GluonFX extends JavaFX with additional components including a Rich Text Area, interactive Maps, and Emoji support. For mobile development, Gluon Mobile leverages GraalVM native image to compile JavaFX apps for iOS and Android from a single codebase. Gluon also provides JavaFX Long Term Support (LTS) contracts, commercial support for enterprises running JavaFX 11+, IDE plugins for IntelliJ IDEA, Eclipse, and NetBeans, and the GluonFX Maven/Gradle plugins that streamline the build and deployment pipeline. Gluon's deep involvement in the JavaFX ecosystem—from tooling to core contributions—makes it the go-to commercial partner for JavaFX-based enterprise, desktop, and mobile development.
+
+## Code Example
+
+```java
+import com.gluonhq.charm.glisten.application.MobileApplication;
+import com.gluonhq.charm.glisten.control.AppBar;
+import com.gluonhq.charm.glisten.mvc.View;
+import javafx.scene.control.Label;
+import javafx.scene.layout.StackPane;
+
+public class HelloGluon extends MobileApplication {
+
+    @Override
+    public void init() {
+        addViewFactory(HOME_VIEW, () -> {
+            Label label = new Label("Hello, Gluon Mobile!");
+            View view = new View(new StackPane(label));
+            view.showingProperty().addListener((obs, oldValue, newValue) -> {
+                if (newValue) {
+                    AppBar appBar = getAppBar();
+                    appBar.setTitleText("Gluon Mobile");
+                }
+            });
+            return view;
+        });
+    }
+
+    public static void main(String[] args) {
+        launch(args);
+    }
+}
+```