## Description
Adds DMA-BUF support for non-NVIDIA GPUs using GL elements as conversion
workaround.
Tested with QSV and VA encoders, note that H.264 seems to only work for
QSV encoder, for `vah264(lp)enc` theres major CPU usage with DMA-BUF
enabled.
Don't mind the branch name, I was working on relay before and changed
gears to runner after noticing some DMA-BUF stuff 😅
<!-- This is an auto-generated comment: release notes by coderabbit.ai
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## Summary by CodeRabbit
- **Chores**
- Added a `.dockerignore` file to exclude the `target` directory from
Docker builds.
- Updated `.gitignore` to ignore the `target` directory.
- **New Features**
- Enhanced video processing pipeline with updated handling of DMA-BUF
support, including improved compatibility for different GPU vendors and
refined video element configurations.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
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Co-authored-by: DatCaptainHorse <DatCaptainHorse@users.noreply.github.com>
