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/windows/nsis/Include/SetTitleBar.nsh

@@ -0,0 +1,5 @@
+; Allow title masquerading
+!define SetTitleBar "!insertmacro SetTitleBar"
+!macro SetTitlebar title
+  SendMessage $HWNDPARENT ${WM_SETTEXT} 0 "STR:${title}"
+!macroend