feat: add exitModeOnEscape option to exit active modes via Escape key

Adds a new global option `exitModeOnEscape` that allows users to exit
any active mode (draw, edit, drag, rotate, remove, cut) by pressing
the Escape key.

Usage:
  map.pm.setGlobalOptions({ exitModeOnEscape: true });

- Option is disabled by default for backward compatibility
- Handles all mode types: draw, edit, drag, removal, rotate, and cut
- Includes TypeScript definitions
- Includes comprehensive Cypress E2E tests

Closes #1586

Author: mscno