New doc design

[benjeffery]

Using new tskit-book-theme

The only question I have is whether this is acceptable:

[codecov[bot]]

Codecov Report

Merging #2102 (27d54ab) into main (e08b94f) will not change coverage. The diff coverage is n/a.

@@           Coverage Diff           @@
##             main    #2102   +/-   ##
=======================================
  Coverage   91.32%   91.32%           
=======================================
  Files          20       20           
  Lines       10889    10889           
  Branches     2270     2270           
=======================================
  Hits         9944     9944           
  Misses        516      516           
  Partials      429      429           

Flag	Coverage Δ
C	91.32% <ø> (ø)
python	98.74% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

---

Continue to review full report at Codecov.

Legend - Click here to learn more Δ = absolute <relative> (impact), ø = not affected, ? = missing data Powered by Codecov. Last update e08b94f...27d54ab. Read the comment docs.

[jeromekelleher]

What does the current viz look like?

[benjeffery]

[jeromekelleher]

Thanks - LGTM!