Add some rules to text lint

We agreed that some forms should not be used. We were also advised to avoid some constructs. Maybe we could enforce them with additional linter rules? There's already rule for CodeWars, so maybe we could also have:

plurals mentioned by B4B: katas, dans, kyus, with abominations like dan's or kyu's
kyu, as opposed to ky-u-with-dash-above
codewarrior as a term to avoid,
dojo and others with remark to reduce usage of the theme?

Maybe you can think of some more. They don't have to be errors, they can be warnings if appropriate (yeah, I read through warnings, usually)

What do you think?

codewars / docs

Add some rules to text lint #73