Improved tooltips in `nodes/video_node.py` and `nodes/image_node.py` to provide better UX guidance:
- Added a tip to `include_video_info` in `DiscordSendSaveVideo` suggesting it as a safer alternative to disabling `add_time` to avoid Discord's single-frame playback bug.
- Added a warning to `resize_to_power_of_2` in `DiscordSendSaveImage` about potential aspect ratio distortion.
- Updated `tests/test_ux_tooltips.py` to verify the new tooltip content.
Co-authored-by: AEmotionStudio <163354043+AEmotionStudio@users.noreply.github.com>