Implement VideoWriter / VideoReader

[edgarriba]

implement an initial mp4 reader/writer in kornia-io

• VideoWritter Implement H264 VideoWritter with gstreamer #135
• VideoReader

Evaluate wheter to use the crates below

• gstreamer: https://github.com/kornia/kornia-rs/blob/video/src/io/video.rs [this solution for now as can support hardware acceleration]
• https://github.com/alfg/mp4-rust

also requested by @haixuanTao dora-rs

[edgarriba]

possibly start with gstreamer as the api will be similar with the camera stream and reuse some code
https://github.com/kornia/kornia-rs/blob/main/crates/kornia-io/src/stream/capture.rs

In addition, gstreamer has some large and already validated support to hw acceleration