fix: improve play/pause behavior on desktop

[alexmello735-del]

Pull Request Description

Changed the GestureDetector on video_player_controls.dart:

• onTap now handles only touch logic
• onHorizontalDragDown handles pointer play/pause logic (previously on onTap), it triggers on clicks with mouse moving also, improving reliability.

Issue Being Fixed

Before, play/pause on click would not register if mouse was still moving when the click event triggered. But mouse movement is to be expected when quickly switching screens/windows, etc.

Resolves #580

Screenshots / Recordings

old: play/pause fails when mouse moving

old.2.mp4

new: play/pause works with mouse moving

new.2.mp4

Tested On

• Android
• Android TV
• iOS
• Linux
• Windows
• macOS
• Web

Checklist

• If a new package was added, did you ensure it works for all supported platforms? Is the package well maintained
• Check that any changes are related to the issue at hand.