Implement automatic checking & correction of inconsistent strings in Weblate

I think we should enable some of these checks by default in Weblate:
https://docs.weblate.org/en/latest/user/checks.html
https://docs.weblate.org/en/latest/admin/config.html#std:setting-CHECK_LIST

I know that some of these inconsistencies are actually coming from manual translations over Git, and I want to fix this site of the story too, so that people cannot commit inconsistent strings when not using Weblate, but we shouldo fix this in Weblate too.

Feature Branch: emmapeel:bug/15361-checks

Parent Task: #11759 (closed)

Related issues

• Related to #15362 (closed)
• Related to #15365 (closed)
• Related to #16122 (closed)

Original created by @u on 15361 (Redmine)