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/README.md

@@ -0,0 +1,23 @@
+QZ Tray
+========
+
+ [![Build Status](https://github.com/qzind/tray/actions/workflows/build.yaml/badge.svg)](../../actions) [![Downloads](https://img.shields.io/github/downloads/qzind/tray/latest/total.svg)](../../releases) [![Issues](https://img.shields.io/github/issues/qzind/tray.svg)](../../issues) [![Commits](https://img.shields.io/github/commit-activity/m/qzind/tray.svg)](../../commits)
+
+Browser plugin for sending documents and raw commands to a printer or attached device
+
+## Getting Started
+  * Download here https://qz.io/download/
+  * See our [Getting Started](../../wiki/getting-started) guide.
+  * Visit our home page https://qz.io.
+  
+## Support
+  * File a bug via our [issue tracker](../../issues)
+  * Ask the community via our [community support page](https://qz.io/support/)
+  * Ask the developers via [premium support](https://qz.io/contact/) (fees may apply)
+
+## Changelog
+  * See our [most recent releases](../../releases)
+
+## Java Developer Resources
+  * [Install dependencies](../../wiki/install-dependencies)
+  * [Compile, Package](../../wiki/compiling)