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/installer/browser/AppFinderTests.java

@@ -0,0 +1,44 @@
+package qz.installer.browser;
+
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
+import qz.installer.certificate.firefox.FirefoxCertificateInstaller;
+import qz.installer.certificate.firefox.locator.AppAlias;
+import qz.installer.certificate.firefox.locator.AppInfo;
+import qz.installer.certificate.firefox.locator.AppLocator;
+
+import java.nio.file.Path;
+import java.util.ArrayList;
+import java.util.Date;
+
+public class AppFinderTests {
+    private static final Logger log = LogManager.getLogger(AppFinderTests.class);
+
+    public static void main(String ... args) throws Exception {
+        runTest(AppAlias.FIREFOX);
+    }
+
+    private static void runTest(AppAlias app) {
+        Date begin = new Date();
+        ArrayList<AppInfo> appList = AppLocator.getInstance().locate(app);
+        ArrayList<Path> runningPaths = AppLocator.getRunningPaths(appList);
+
+        StringBuilder output = new StringBuilder("Found apps:\n");
+        for (AppInfo appInfo : appList) {
+            output.append(String.format("      name: '%s', path: '%s', exePath: '%s', version: '%s'\n",
+                                        appInfo.getAlias().getName(),
+                                        appInfo.getPath(),
+                                        appInfo.getExePath(),
+                                        appInfo.getVersion()
+            ));
+
+            if(runningPaths.contains(appInfo.getExePath())) {
+                FirefoxCertificateInstaller.issueRestartWarning(runningPaths, appInfo);
+            }
+        }
+
+        Date end = new Date();
+        log.debug(output.toString());
+        log.debug("Time to find and execute {}: {}s", app.name(), (end.getTime() - begin.getTime())/1000.0f);
+    }
+}