SwyxTray und Firefox-Plugin in das Repository aufnehmen

Windows-Tray-Anwendung (CLMgr-Anbindung an SwyxIt!) samt WebSocket-Zugang,
Firefox-Erweiterung und Browser-Beispielclient.

.gitignore

@@ -0,0 +1,43 @@
+# --- Secrets ---
+.env
+.env.*
+!.env.example
+
+# --- OS ---
+.DS_Store
+Thumbs.db
+
+# --- IDE ---
+.idea/
+*.iml
+*.iws
+*.ipr
+*.code-workspace
+
+# --- Java / Maven ---
+target/
+*.class
+*.jar
+*.war
+*.log
+.mvn/wrapper/maven-wrapper.jar
+
+# --- Node ---
+node_modules/
+node/
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+
+# --- Vaadin / Vite ---
+.vaadin/
+.vite/
+*.tsbuildinfo
+tsconfig.tsbuildinfo
+core/vite.generated.ts
+core/src/main/frontend/generated/
+
+# --- .NET (SwyxTray) ---
+bin/
+obj/
+*.user