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/ant/private/private.properties

@@ -0,0 +1,5 @@
+signing.alias=self-signed
+signing.keystore=ant/private/qz.ks
+signing.keypass=jzebraonfire
+signing.storepass=jzebraonfire
+signing.algorithm=SHA-256