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/SUPPORT.md

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+Please feel free to open bug reports on GitHub. Before opening an issue, we ask that you consider whether your issue is a support question, or a potential bug with the software.
+
+If you have a support question, first [check the FAQ](https://qz.io/wiki/faq) and the [wiki](https://qz.io/wiki/Home).  If you cannot find a solution please reach out to one of the appropriate channels:
+
+### Community Support
+
+If you need assistance using the software and do not have a paid subscription, please reference our community support channel: https://qz.io/support/
+
+### Premium Support
+
+If you have an active support license with QZ Industries, LLC, please send support requests to support@qz.io