Add motor test warning modal

[1Blademaster]

[Copilot]

Pull Request Overview

This PR adds a safety warning modal to the motor test functionality that alerts users to remove propellers and secure the drone before testing motors. The modal appears when users access the motor test panel and must be dismissed before proceeding.

• Adds a new Redux state field showMotorTestWarningModal to control modal visibility
• Implements the warning modal UI in the motor test component with safety messaging
• Resets the modal to show again after drone reconnection for repeated safety reminders

Reviewed Changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 1 comment.

File	Description
gcs/src/redux/slices/configSlice.js	Adds Redux state, actions, and selectors for motor test warning modal
gcs/src/redux/middleware/socketMiddleware.js	Resets warning modal visibility on drone connection
gcs/src/components/config/motorTest.jsx	Implements the safety warning modal UI and integrates with Redux state

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