Chameleon theme

Chameleon is a fork of Typing theme, rewrote from scratch with the following changes/features:

sanitize.css and autoprefixer for consistent cross-browser styling.
Utilise relative length instead of absolute length in the css.
prefers-color-scheme to apply light/dark theme according to the OS preference.
Add a Copy button to each code block.
Removed jQuery, fancyBox, web analytics, comment plugins, donation links and typo.css.
Homepage shows index of posts (same as /archives).