v1.0.2 of zebra_printer_cpcl

Flutter management package for Zebra printers. Uses Zebra Link-OS SDK for Bluetooth & Network discovery, CPCL printing, ZPL printing, and printer management. Changelog excerpt: - Add checkAndRequestPermissions() to BluetoothManager for requesting Bluetooth-related permissions. - Add _requiredBluetoothPermissions() helper method to determine which permissions are needed on different platforms. - Improve permission handling by checking for permanently denied permissions and opening app settings when necessary. - Update README.md with information about permission requirements and usage examples. - Add test/bluetooth_manager_permissions_test.dart to verify permission handling logic.