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/test/qz/printer/info/NativePrinterTests.java

@@ -0,0 +1,39 @@
+package tests.qz.printer.info;
+
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
+import qz.printer.PrintServiceMatcher;
+import qz.printer.info.NativePrinter;
+import qz.printer.info.NativePrinterMap;
+
+import java.util.Date;
+
+public class NativePrinterTests {
+    private static final Logger log = LogManager.getLogger(NativePrinterTests.class);
+
+    public static void main(String ... args) {
+        for (int i = 0; i < 10; i++) {
+            runTest();
+        }
+    }
+
+    private static void runTest() {
+        Date begin = new Date();
+        NativePrinterMap printers = PrintServiceMatcher.getNativePrinterList();
+        StringBuilder output = new StringBuilder("Found printers:\n");
+        for (NativePrinter printer : printers.values()) {
+            output.append(String.format("      printerId: '%s', description: '%s', driverFile: '%s', " +
+                                                "resolution: '%s', driver: '%s'\n",
+                                        printer.getPrinterId(),
+                                        printer.getDescription(),
+                                        printer.getDriverFile(),
+                                        printer.getResolution(),
+                                        printer.getDriver()
+            ));
+        }
+        Date end = new Date();
+        log.debug(output.toString());
+        log.debug("Time to find printers: " + (end.getTime() - begin.getTime()));
+    }
+
+}