* doc: Add security features troubleshooting doc

This adds a document explaining how to troubleshoot the Apparmor and
systemd sandboxing features added to the apt-news service.

* global replace of apparmor with AppArmor

* Review from Sally: wording on the description of how applications can behave under confinement

Co-authored-by: Sally <[email protected]>

* Systemd capitalization

* Turns out it should be systemd instead (lowercase)

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Co-authored-by: Sally <[email protected]>

Add guide to setup windows machine for running our
integration tests on WSL instances

* docs: update pro fix examples

The pro fix commands were updated recently. Due to that,
we need to update the output examples in the docs.

* docs: better visualize fixing multiple CVEs

Add a how-to-guide to allow users to better visualize the status of each
CVE they have try to fix when running the fix execute API endpoint

Co-authored-by: Sally <[email protected]>

There's a jq in a link as well, so spellcheck still fails. I've re-added jq to the wordlist.