Add multi-finger gesture support

[devload]

Description

Add support for multi-finger gestures like two-finger swipe, three-finger tap, etc.

Requirements

• Support 2-finger, 3-finger, 4-finger gestures
• Implement multi-finger swipe
• Implement multi-finger tap
• Handle simultaneous touch points
• Use ADB multi-touch capabilities

Files

• smartmonkey/exploration/action.py (add MultiTouchAction)
• smartmonkey/device/event_manager.py (add multi-touch methods)

Usage example

# Two-finger swipe up
MultiTouchAction(fingers=2, gesture="swipe_up")

# Three-finger tap
MultiTouchAction(fingers=3, gesture="tap", x=540, y=960)

Acceptance Criteria

• Multi-finger tap support (2-4 fingers)
• Multi-finger swipe support
• Simultaneous touch point simulation
• Works on gesture-based apps