Keep Drone Alive Function

Business Requirements:

The Tello Drone will automatically land after 15 seconds without receiving new input. It often takes close to this time limit to record, process, and receive a prediction response from a brainwave. The current work around is a "Keep Alive" button that triggers a query to the drone battery so it neither moves nor triggers the auto lander. Currently, this button must be manually pressed. We would like this functionality to be converted to a "Keep Alive" mode that can be toggled on and off and will run the keep alive action in a timed loop.

Technical Details:

Create a button for a keep alive toggle available from the brainwave prediction window.
Connect the button to a function or thread that will run a loop sending the drone a non-movement signal every 10 seconds. (Current keep alive button uses tello.query_battery())
Provide user feedback indicating the state of the keep alive toggle.

Acceptance Criteria:

Users can toggle a mode that keeps the drone from automatically landing. When the user is running a live prediction demo, there is an indicator available as to whether the keep alive mode is being used or not.

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