CPU and memory graph using tui-bar-graph

[joshka]

Is your feature request related to a problem? Please describe.
I wrote a small bar graph crate that looks nice based on some ideas from btop. I wonder if it would fit well in this crate? https://crates.io/crates/tui-bar-graph

Describe the solution you'd like
I wonder if this might make the CPU bar look prettier. Also looking for feedback on the API.
Note that this is a new crate and the specific interface parts to pass in the gradient config may change a bit due to a PR I have on the colorgrad project to do with implementing the Gradient trait on Box<dyn Gradient>

Describe alternatives you've considered

Additional context