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/utils/JsonWriterTests.java

@@ -0,0 +1,46 @@
+package qz.utils;
+
+import org.codehaus.jettison.json.JSONException;
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
+
+import java.io.IOException;
+
+public class JsonWriterTests {
+
+    private static final Logger log = LogManager.getLogger(JsonWriterTests.class);
+
+    private static String DEFAULT_PATH = "/Applications/Firefox.app/Contents/Resources/distribution/policies.json";
+    private static String DEFAULT_DATA = "{ \"policies\": { \"Certificates\": { \"ImportEnterpriseRoots\": true } } }";
+    private static boolean DEFAULT_OVERWRITE = false;
+    private static boolean DEFAULT_DELETE = false;
+
+    public static void main(String... args) {
+        String usingPath = DEFAULT_PATH;
+        if (args.length > 0) {
+            usingPath = args[0];
+        }
+        String usingData = DEFAULT_DATA;
+        if (args.length > 1) {
+            usingData = args[1];
+        }
+        boolean usingOverwrite = DEFAULT_OVERWRITE;
+        if (args.length > 2) {
+            usingOverwrite = Boolean.parseBoolean(args[2]);
+        }
+        boolean usingDeletion = DEFAULT_DELETE;
+        if (args.length > 3) {
+            usingDeletion = Boolean.parseBoolean(args[3]);
+        }
+
+        try {
+            JsonWriter.write(usingPath, usingData, usingOverwrite, usingDeletion);
+        }
+        catch(JSONException jsone) {
+            log.error("Failed to read JSON", jsone);
+        }
+        catch(IOException ioe) {
+            log.error("Failed to access file", ioe);
+        }
+    }
+}