Open AV1 Files with rav1d

[AldaronLau]

https://github.com/memorysafety/rav1d

Blocked on memorysafety/rav1d#592

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Closing these issues, with getting rid of the current dependency (which doesn't seem to work anyway):

#20

#211

[AldaronLau]

Or https://crates.io/crates/aom-decode