Fix custom descriptions in OG tags

Improve the OG description tag

Add OpenGraph images to directories and generated files

Remove redundant Mojolicious dependency

This was only used for the old tests, not the simple end to end tests
that lean on `diff`.

Fix whitespace

Fix broken markup in test expectations

Strip trailing slashes from meta and link tags

Sundry improvements

+ Add a style for image credits.
+ Fix max width of images.
+ Move Atom feed from icon to link below menu.

Fixes https://todo.sr.ht/~duncan-bayne/halp/14.

Remove unnecessary Data::Dump dependency

Don't link RSS feed twice on directory listing

Fix hamburgers link

Remove all AI slop from the project

Remove the AI-generated Halp icon

Support dark mode

Fixes: https://todo.sr.ht/~duncan-bayne/halp/19

Install CPAN modules without testing if in CI

Email me when the build fails

Install additional missing dependencies

Suppress CPAN prompts during installation

Switch to using CPAN on all OSs

Fix expected files to include adblocker recommendation