OpenScreen 1.13.0 ڈاؤن لوڈ

Thanks @heyitsR1 for the macOS permission diagnosis in #302, which led to the HUD dialog fix in this release (#733).

## What's Changed
• fix(export)：9:16 projects exported as stretched 16:9 by @EtienneLescot in https://github.com/getopenscreen/openscreen/pull/678
• fix(compositor)：clamp the click-bounce cursor size at zero by @EtienneLescot in https://github.com/getopenscreen/openscreen/pull/680
• fix(compositor)：keep privacy blur on its content under zoom and 3D tilt by @EtienneLescot in https://github.com/getopenscreen/openscreen/pull/679
• fix(compositor)：match the Linux background blur to the HLSL/Metal Kawase by @EtienneLescot in https://github.com/getopenscreen/openscreen/pull/681
• feat：add German (de) locale by @mario-soller in https://github.com/getopenscreen/openscreen/pull/672
• feat(website)：SEO pages, v1.11.0 fact fixes, 8 locales and Docusaurus Faster by @EtienneLescot in https://github.com/getopenscreen/openscreen/pull/697
• docs(website)：keep comparison pages to the choices that matter by @EtienneLescot in https://github.com/getopenscreen/openscreen/pull/701
• feat(3d)：follow-cursor camera, modelled 3D cursor and 3D effects by @EtienneLescot in https://github.com/getopenscreen/openscreen/pull/682
• revert：back out the 3D effects until they run on macOS and Linux by @EtienneLescot in https://github.com/getopenscreen/openscreen/pull/703
• fix(audio)：boost the mic only over system audio, and clamp the mix once by @EtienneLescot in https://github.com/getopenscreen/openscreen/pull/698
• feat(3d)：follow-cursor camera, modelled 3D cursor and 3D effects by @EtienneLescot in https://github.com/getopenscreen/openscreen/pull/704
• feat(frames)：model the device frames in 3D by @EtienneLescot in https://github.com/getopenscreen/openscreen/pull/705
• chore(release)：release v1.12.0 into main by @EtienneLescot in https://github.com/getopenscreen/openscreen/pull/712

## New Contributors
• @mario-soller made their first contribution in https://github.com/getopenscreen/openscreen/pull/672

**Full Changelog**：https://github.com/getopenscreen/openscreen/compare/v1.12.0...v1.13.0