Versioned descriptor for E_Iwd_Config with auto_connect, show_hidden,
refresh_interval and preferred_adapter; load/save against the
"module.iwd" domain. Stale or missing config falls back to defaults.
The settings dialog UI is still a stub.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Meson build, module entry points, and stub layout for the iwd backend
(D-Bus client, gadget, popup, config, UI widgets). Bodies are TODOs;
this compiles against EFL/E headers but performs no D-Bus work yet.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
