link-checking

From the pleasant discussion with @mre here lycheeverse/lychee-action#82, I intend to work on trying to parse the input URL before passing it to reqwest in order to prevent lychee from panicking, skip the invalid URL and move on to the next one.

Bonus:

• If we can track these invalidated URL's and show them to users at the end so that they are able to fix or igno

The first time I used this action it was difficult to understand the nature of outputs obtained on a link that is broken and a one that is not.
I wanted to add examples to the documentation describing the above.

Is your feature request related to a problem? Please describe.
Use case: checking for broken links in a logged in pages.

Describe the solution you'd like
hydra provides username/password to login and then checks for broken links inside the logged in pages.

Describe alternatives you've considered
Other than provides username/password we may able to provide session/cookie

It will be great to have a docker image that one can run locally or in CI instead of needing to install/download a binary.