* Capture libraries: Replaced WinPcap with libpcap (Linux/Unix) and Npcap (Windows).
* Platform support: Updated supported platforms to Linux, macOS, and Windows.
* Section numbering: Corrected section numbering (e.g. "1. Where to Get" → "2. Where to Get").
* Version reference: Removed fixed Wireshark 2.2.6 reference and added a link to the official Wireshark User's Guide.
* Shell script: Switched from deprecated ifconfig/iwconfig to ip/iw; removed channel line from the default script and documented it as optional; clarified that root/sudo is required.
* NIC discovery: Documented how to find the wireless NIC using ip link show or iw dev.
* Export menu: Updated export path to File → Export Packet Dissections → as Plain Text.
* Display filters: Added common wireless filters (wlan.ssid, wlan.addr, wlan.bssid, eapol, etc.).
* Decryption keys: Added a section on configuring WPA/WEP decryption keys, including key format table and a note on the EAPOL handshake requirement.
Co-Authored-By: Zhang Shu Xian
