[hthienloc]

Description

Adds an Airplane mode toggle tile to the Control Center widget library, following up on the suggestion from @apollo79 and @georgestafilidis in #4270.

• Server (rfkill): Adds rfkill.getState and rfkill.setAirplaneMode IPC methods to toggle all wireless radios via /dev/rfkill (RFKILL_OP_CHANGE_ALL).
• QML: Exposes DMSService.rfkillAvailable, setAirplaneMode, and toggleAirplaneMode; adds AirplaneModeTile and registers airplaneMode in the Control Center network widget category (default layout unchanged).

Type of change

• New feature (non-breaking change that adds functionality)

Related issues

Follow-up to #4270.

[github-actions]

Claude review

No issues found.
Checked: rfkill CHANGE_ALL event layout and write path, router nil guard, Linux/non-Linux manager parity, DMSService rfkill state/available handling and subscription initial state, AirplaneModeTile against CcTile and sibling tiles, WidgetModel registration, I18n usage, tokens and deprecated shims. Model: claude-opus-5-5.