Vulkan video decoding support

[waruiji]

Could you please consider enabling Vulkan video decoding support?
If I understand correctly -Dvulkan-interop=true needs to be added to build options.

Thanks!

[Asif Ali Rizvan]

#308

../meson.build:1330:0: ERROR: Feature vulkan-interop cannot be enabled: Vulkan Interop requires vulkan headers >= 1.3.238, libplacebo >= 6.278.0, and libavutil >= 58.11.100

https://aur.archlinux.org/packages/mpv-full?all_deps=1#comment-931987

Could you create a PR.

[waruiji]

#332

[waruiji]

Closing as after the recent updates the Vulkan support seems to be working as expected!