Dump waves to something better than VCD

[mkorbel1]

Motivation

VCD files are simple but big and slow. Other formats could be better for disk space and performance.

Desired solution

Find wave dump format(s) which enable lower space and/or higher performance.

One option could be FST. There's a discussion on adding it to treadle here that may be of interest: https://github.com/chipsalliance/treadle/issues/101

Alternatives considered

Some vendors and tools have proprietary formats that work well with their debug tools. Perhaps it's worth investigating methods to generate those formats.