add on-device function to fully dis/enable wifi on the Orbic RC400L

### Prerequisites

- [x] I have read [CONTRIBUTING.md](https://github.com/EFForg/rayhunter/blob/main/CONTRIBUTING.md)

### What problem does this feature solve or what does it enhance?

on the Orbic RC400L, the device’s GUI seemingly only allows a user to switch between broadcasting 2.4GHz and 5GHz, and does not offer the ability to completely disable wifi. a script is provided by the Rayhunter team (https://efforg.github.io/rayhunter/faq.html#how-do-i-disable-the-wifi-hotspot-on-the-orbic-rc400l) to disable wireless, but this requires a computer or other device.

it would be nice if there was an on-device way to dis- and re-enable wifi broadcasting on-demand, so that the device can be left on and scanning without adding unnecessary wifi radio noise in often already congested RF environments.

### Proposed Solution

this could potentially be achieved via a key shortcut. it would seem that we can already use key shortcuts for functions like stopping and starting a capture (https://efforg.github.io/rayhunter/using-rayhunter.html#key-shortcuts).

in the “Configuration > Device Input Mode” section of the web ui, we could add a “Triple-tap to toggle wifi broadcast” option (or similar).

### Alternatives Considered

_No response_