v0.6.1: Add local Ports viewer (listening sockets & processes)

Introduce a desktop-only Ports viewer that lists the machine's listening TCP/UDP sockets and owning processes. Adds a Rust Tauri command (src-tauri/src/ports.rs + main.rs) and new deps (netstat2, sysinfo) in src-tauri/Cargo.toml/Cargo.lock. Exposes listListeningPorts in src/lib/network.ts and implements a full Ports UI in NetworkTools.tsx (scan/refresh, filtering, favourites persisted, favourites-only view). Also updates App.tsx to enable disabled search results, updates tool metadata, settings docs/permissions, and related UI pieces.