When pushing packets with no frame/timestamp, we should auto generate frame numbers

[SoylentGraham]

I think I implemented this in one of the decoders (for debugging?) but this should be everywhere.

• I may have put it in a different high level library
• Will error if you then start providing data with frames other than 0
• Need to be careful about un-timed SPS/PPS/Headers
• Frame numbers dictated by output rather than input
• We should never ever output a frame with a duplicated frame number unless it IS the same frame (eg. double decode keyframe - or some kinda meta frame - though that should be in the peek meta)

[SoylentGraham]

This is currently being done in apple TDecompressorH264 when pushing data into decoompressor