[ISSUE] <!---Link-->s to https urls, that break the build when the link is broken, would be nice

[lestephane]

Do you have an idea to improve the project? Please describe.

I'd like to link to other web pages, and know when the link is broken.

Documaid could verify markdown links, or provide some support for https:// url in <!---[Link]-->s like, for example:

Our starting point is the proverbial hello world from the <!---[Link](https://quantummaid.de/docs/01_gettingstarted.html "\"Getting Started\" guide")-->