speed-levels benchmarking

This program relies on hyperfine, install it with cargo install hyperfine.

``` USAGE: speed-levels-rs [OPTIONS] ... --encoders ... --tag

FLAGS: -h, --help Prints help information -V, --version Prints version information

OPTIONS: -e, --encoders ... Specify the encoder paths -l, --limit Number of frames to encode [default: 10] -o, --outdir Output directory [default: ~/Encoded] -t, --tag Descriptive tag

ARGS: ... Input Files ```