Lockout guides pilot

[rachelnabors]

This is a different approach to the User Lockout docs. It:

• Introduces a new Guides section to the docs
• Groups the new content together under a "Job to be done" heading of "Protect accounts from attacks"

The guides section is just underneath the Quickstarts and Tutorials in the main nav (icon requires a push to marketing):

The section is a little scanty for now, but as the content grows, so too shall this landing page:

See them here:

• Guides landing page
• Brute force attacks
• Customize the max attempts before getting locked out and duration of lock out
• Unlock user accounts from the Clerk Dashboard
• Programmatically locking and unlocking user accounts

[github-actions]

Hey @rachelnabors, your docs preview is available.

Status	Preview	Updated (UTC)
🍪 Updated	Visit preview	Nov 29, 2023 05:41 PM

[yourtallness]

Other than a few copy suggestions, looks good to me.

Note: we'll need to update the screenshots for the Attack Protection page, because it's undergoing a revamp.

[rachelnabors]

User testing showed learners are more likely to look for these guides in "Security." Hence, we are for updating this PR to put the new guides under that heading instead of in a new Guide section:

[rachelnabors]

Going to close this PR since we're moving them under Security in another PR