Refactor/reorganize locale strings

[david-yz-liu]

Proposed Changes

(Describe your changes here. Also describe the motivation for your changes: what problem do they solve, or how do they improve the application or codebase? If this pull request fixes an open issue, use a keyword to link this pull request to the issue.)

This pull request removes the old catch-all config/locales/en.yml, categorizing the keys into the various config/locales/ subdirectories.

Screenshots of your changes (if applicable)

Associated documentation repository pull request (if applicable)

Type of Change

(Write an X or a brief description next to the type or types that best describe your changes.)

Type	Applies?
🚨 Breaking change (fix or feature that would cause existing functionality to change)
✨ New feature (non-breaking change that adds functionality)
🐛 Bug fix (non-breaking change that fixes an issue)
🎨 User interface change (change to user interface; provide screenshots)
♻️ Refactoring (internal change to codebase, without changing functionality)	X
🚦 Test update (change that only adds or modifies tests)
📦 Dependency update (change that updates a dependency)
🔧 Internal (change that only affects developers or continuous integration)

Checklist

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Before opening your pull request:

• I have performed a self-review of my changes.
  • Check that all changed files included in this pull request are intentional changes.
  • Check that all changes are relevant to the purpose of this pull request, as described above.
• I have added tests for my changes, if applicable.
  • This is required for all bug fixes and new features.
• I have updated the project documentation, if applicable.
  • This is required for new features.
• If this is my first contribution, I have added myself to the list of contributors.

After opening your pull request:

• I have updated the project Changelog (this is required for all changes).
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• I have reviewed the test coverage changes reported by Coveralls.
• I have requested a review from a project maintainer.

Questions and Comments

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[coveralls]

Coverage Report for CI Build 27913869897

Coverage remained the same at 90.266%

Details

• Coverage remained the same as the base build.
• Patch coverage: 8 uncovered changes across 4 files (14 of 22 lines covered, 63.64%).
• No coverage regressions found.

Uncovered Changes

File	Changed	Covered	%
app/controllers/automated_tests_controller.rb	3	1	33.33%
app/controllers/starter_file_groups_controller.rb	3	1	33.33%
app/controllers/submissions_controller.rb	4	2	50.0%
app/helpers/repository_helper.rb	5	3	60.0%
Total (8 files)	22	14	63.64%

Coverage Regressions

No coverage regressions found.

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Coverage Stats

Relevant Lines:	50436
Covered Lines:	46514
Line Coverage:	92.22%
Relevant Branches:	2309
Covered Branches:	1097
Branch Coverage:	47.51%
Branches in Coverage %:	Yes
Coverage Strength:	127.17 hits per line

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💛 - Coveralls