wezterm colored tabs

[bbkane]

Get a better hash function (the current one only seems to produce pink and blue).

ideas:

• https://github.com/zenozeng/color-hash
• https://www.partow.net/programming/hashfunctions/#BKDRHashFunction

[bkane-msft]

https://news.ycombinator.com/item?id=39227831 - generating color schemes