Implement drag and drop action

[devload]

Description

Add support for drag and drop gestures to move UI elements.

Requirements

• Implement DragAction class
• Support drag from (x1, y1) to (x2, y2)
• Support drag element to target element
• Add duration parameter (default 500ms)
• Integrate with ADB input swipe command

Files

• smartmonkey/exploration/action.py (add DragAction)
• smartmonkey/device/event_manager.py (add drag method)

Usage example

# Drag from point to point
DragAction(from_x=100, from_y=200, to_x=500, to_y=800, duration=500)

# Drag element to target
DragAction(element=source_elem, target=target_elem)

Acceptance Criteria

• DragAction class implemented
• ADB swipe command integration
• Duration parameter support
• Element-to-element drag support
• Unit tests added