Track: Create a versioned site for lsd for both docs and theme

[Wei Zhang]

xref:

• #602
• #968 (comment)

TODOs:

• Create a repo for the site https://github.com/lsd-rs/lsd-rs.github.io
• Choose a tool and theme with versions for the site, it should be better to fit both docs and themes(personally prefer using hugo)
• Create the docs site
• Create the theme site