[Feature]: Allow to config keyboard shortcut to quit

[voltage-poppy]

Feature Description

Allow to config the keyboard shortcut to quit the application. A sensible default would be:

• Ctrl+Q on Windows & Linux
• Cmd+Q on macOS

These shortcuts are standard and widely used across most Apps.

Background

Adding a standard quit shortcut like Ctrl+Q is common practice and would improve the user experience, making the app efficient for power users. Thank you for considering this feature.

Priority (Optional)

• High
• Medium
• Low