escpos_arabic: Pure Dart library prints Arabic correctly on ESC/POS receipt printers

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A new pure Dart package called escpos_arabic generates ESC/POS byte commands for thermal receipt printers. It addresses a common problem where Arabic text prints incorrectly because printers do not shape letters, print in isolated forms, or handle right-to-left order. The library shapes Arabic letters, reorders lines, and encodes text to CP864 or Windows-1256 code pages. It also supports layout, barcodes, QR codes, and images, while leaving the transport layer such as Bluetooth, USB, or network to the developer. The package is described as a maintained replacement for esc_pos_utils and is available on GitHub.

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