Expose precise location coordinates (simctl location / adb emu geo)

[thymikee]

Location can currently be toggled on/off via settings location on|off. There is no way to set specific coordinates. iOS has xcrun simctl location <device> set <lat> <lon> and Android has adb emu geo fix <lon> <lat>. Map-based, delivery, or location-aware apps need this for deterministic tests.

Proposal: Add a command (e.g. location set <lat> <lon> or extend settings with a location set mode) that:

• Accepts latitude and longitude (and optionally altitude if supported).
• On iOS: uses simctl location set.
• On Android: uses adb emu geo fix (emulator) and document behavior or alternatives for physical devices if any.

Acceptance criteria:

• Set latitude/longitude (and optionally altitude) for current session device
• Works on iOS simulator and Android emulator; document physical device support if any
• Docs and skill updated