Support wagtail-localize-smartling 0.10

[stevejalim]

• Makes use of the changes (task list, email notifications) landed in Improve workflow around imported translations via tasks and emails wagtail-localize-smartling#54
• Add option to enable the Wagtail Styleguide -- This is handy when developing features: https://docs.wagtail.org/en/stable/contributing/styleguide.html
• Drops the email-notification sending that has now been ported to wagtail-localize-smartling from bedrock into wagtail-localizemartling==0.10.x

[codecov]

Codecov Report

Attention: Patch coverage is 50.00000% with 1 line in your changes missing coverage. Please review.

Project coverage is 79.22%. Comparing base (bb3f3a8) to head (35d6597).
Report is 4 commits behind head on main.

Files with missing lines	Patch %	Lines
bedrock/settings/base.py	50.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #15830      +/-   ##
==========================================
+ Coverage   79.10%   79.22%   +0.11%     
==========================================
  Files         160      159       -1     
  Lines        8312     8287      -25     
==========================================
- Hits         6575     6565      -10     
+ Misses       1737     1722      -15     

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

[alexgibson]

r+