Anonym Part 5: About Page

[dchukhin]

If this changeset needs to go into the FXC codebase, please add the WMO and FXC label.

This pull request depends on #16964

One-line summary

This pull request makes it possible to create the 'About' anonym page.

Significant changes and points to review

• a new model (snippet): Person
• new blocks: PersonCardBlock, ListItemBlock, TwoColumnBlock

Issue / Bugzilla link

Testing

1. log in to Wagtail
2. make sure an Anonym Index Page exists
3. choose to create a child of the Anonym Index Page, and choose an Anonym content sub page
4. edit the page to match the figma designs from the JIRA ticket. Note: this pull request does NOT include the styles needed to match the designs

[codecov]

Codecov Report

❌ Patch coverage is 97.29730% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 80.79%. Comparing base (e6a380c) to head (0b7d1d9).

Files with missing lines	Patch %	Lines
bedrock/mozorg/models.py	91.66%	1 Missing ⚠️

Additional details and impacted files

@@                Coverage Diff                @@
##           anonym-navbar   #16965      +/-   ##
=================================================
+ Coverage          80.72%   80.79%   +0.06%     
=================================================
  Files                164      164              
  Lines               9328     9365      +37     
=================================================
+ Hits                7530     7566      +36     
- Misses              1798     1799       +1     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.