feat: Add ignoreUrls option

[nschonni]

Completely eyeballed and not tested/run. I just wanted to through this up for discussion since I noticed you added the concept of a config file.

[timmkrause]

Cool! Was thinking to add this as well. Can you write a test for it?

[timmkrause]

The following came additionally to my mind: Maybe it would make sense to rename "ignoreUrls" to "ignorePatterns" (or something) and make it regular expressions? I also have the requirement to ignore some relative markdown links. That way it would be more flexible. What do you think?

[nschonni]

Yeah, I think strings or regex makes a bunch of sense to be able to filter them out. I just did this as a quick POC to see if it made sense.
The other part I was thinking of is if the skipped links should show up in the UI somehow. Maybe a yellow [?] instead of the check/X for the pass/failed links

[timmkrause]

The other part I was thinking of is if the skipped links should show up in the UI somehow. Maybe a yellow [?] instead of the check/X for the pass/failed links

Good one. Personally I would prefer that the ignore check happens within link-check (so the ignore options data needs to flow into it) and return an appropriate result of ignored so that the evaluation (and display) can be done in a consistent way by resolving the status appropriately via statusLabels[result.status] in markdown-link-check.runMarkdownLinkCheck().

@tcort What is your opinion?

[timmkrause]

What do you think about #41? I have implemented it using regular expressions to gain more flexibility and made it visible in the CLI.

[nschonni]

Closing this in favour of #41 since it is more fleshed out, and the regex method is a better way to go