Add custom QZ Tray fork with pairing key authentication

- Custom fork of QZ Tray 2.2.x with certificate validation bypassed
- Implemented pairing key (HMAC) authentication as replacement
- Modified files: PrintSocketClient.java (certificate check disabled)
- New files: PairingAuth.java, PairingConfigDialog.java
- Excluded build artifacts (out/, lib/javafx*) from repository
- Library JARs included for dependency management

tray/src/qz/communication/DeviceException.java

@@ -0,0 +1,13 @@
+package qz.communication;
+
+public class DeviceException extends Exception {
+
+    public DeviceException(String message) {
+        super(message);
+    }
+
+    public DeviceException(Throwable cause) {
+        super(cause);
+    }
+
+}