Add a --cname option to create the CNAME file

[Gerrit0]

Search Terms

CNAME GitHub pages

Problem

The repro for Gerrit0/typedoc-plugin-missing-exports#4 has a a build script which copies a CNAME file so that GitHub Pages works properly. We should make this extra build step easier.

Suggested Solution

Add an option --cname, which will result in TypeDoc creating a CNAME file with the contents of that option.

[matteobruni]

I've just seen this issue (and it refers to my project 🤣). I don't use this anymore since the docs folder is inside another website but it could be useful for someone else.

I think a cname string option could fit, that value will be written inside the CNAME file.