Implement hot reload support in Marqueer widget by restarting animations on widget updates

[Neelansh-ns]

Add Hot Reload Support to Marqueer Widget

This PR implements hot reload support for the Marqueer widget, enabling smooth development experience when modifying widget properties during Flutter hot reload.

Changes

• Added didUpdateWidget lifecycle method to detect when key animation properties change
• Automatically restarts animations when critical properties are updated (pps, direction, edgeDuration, infinity)
• Preserves current scroll position during widget updates
• Only restarts when autoStart is enabled

Benefits

• Developers can now modify Marqueer properties and see changes immediately during hot reload
• No need to perform full app restart when tweaking animation parameters
• Maintains smooth user experience by preserving scroll state

Technical Details

• Monitors property changes in didUpdateWidget
• Cleanly stops current animations before restarting
• Maintains scroll controller state to prevent jarring position resets

[Neelansh-ns]

@GeceGibi Please review the above PR.