Remove i18n tech debt from 0.14

[jonboiser]

Summary

1. This removes every current usage of crossComponentTranslator by either moving messages around or into new or existing common[Plugin]strings mixins (new ones were made for "User" and "Device" plugins).

Reviewer guidance

Ideally, try to find each of these messages in the actual app and make sure they are shown correctly (in English, since the messages have new namespaces).

If that's too much, the refactor is pretty mechanical, so just check for typos or things like that.

References

Fixes #7086

Contributor Checklist

PR process:

• PR has the correct target branch and milestone
• PR has 'needs review' or 'work-in-progress' label
• If PR is ready for review, a reviewer has been added. (Don't use 'Assignees')
• If this is an important user-facing change, PR or related issue has a 'changelog' label
• If this includes an internal dependency change, a link to the diff is provided

Testing:

• Contributor has fully tested the PR manually
• If there are any front-end changes, before/after screenshots are included
• Critical user journeys are covered by Gherkin stories
• Critical and brittle code paths are covered by unit tests

Reviewer Checklist

• Automated test coverage is satisfactory
• PR is fully functional
• PR has been tested for accessibility regressions
• External dependency files were updated if necessary (yarn and pip)
• Documentation is updated
• Contributor is in AUTHORS.md

[codecov]

Codecov Report

Merging #7550 into develop will decrease coverage by 23.57%.
The diff coverage is 56.00%.

Impacted Files	Coverage Δ
...olibri/core/assets/src/mixins/commonCoreStrings.js	33.33% <ø> (ø)
kolibri/plugins/coach/assets/src/csv/fields.js	4.22% <ø> (-1.34%)	⬇️
...oach/assets/src/views/common/commonCoachStrings.js	80.00% <ø> (ø)
...assets/src/views/plan/LessonCreationPage/index.vue	0.00% <ø> (ø)
...ch/assets/src/views/plan/LessonsRootPage/index.vue	0.00% <ø> (ø)
...s/src/views/FacilitiesPage/FacilitiesTasksPage.vue	0.00% <0.00%> (ø)
...ageContentPage/ChannelPanel/WithSizeAndOptions.vue	0.00% <0.00%> (ø)
.../device/assets/src/views/ManageTasksPage/index.vue	0.00% <0.00%> (ø)
...ibri/plugins/learn/assets/src/views/LearnIndex.vue	55.66% <ø> (ø)
...plugins/learn/assets/src/views/RecommendedPage.vue	0.00% <ø> (ø)
... and 327 more

[radinamatic]

I know this is context and not the user string, but still remembering that we should steer away from the term content 🙂

Maybe Used to indicate a resource that learners did not yet open and engage with?

[jonboiser]

Is "resource" the most generic term? I would probably even pick something more generic than "content" because "Not started" is a status for things like Exams and Lessons. This string was extracted as a status indicator for an Exam and I think I just wanted to give it a generic category as a common string.

[indirectlylit]

In the coach tools we actually have distinct labels for each type to ensure that the gender agreement is correct. For example:

Lesson not started:

kolibri/kolibri/plugins/coach/assets/src/views/common/status/statusStrings.js

Line 122 in 4cf820b

labelShort: '{count, plural, other {Not started}}',

Exercise not started:

kolibri/kolibri/plugins/coach/assets/src/views/common/status/statusStrings.js

Line 66 in 4cf820b

labelShort: '{count, plural, other {Not started}}',

Also for:

• Question
• Quiz
• Resource

[nucleogenesis]

LGTM! Thanks @jonboiser