Vue Casing

[christianmemije]

Summary

This PR will:

• Make vue component names PascalCase. ✔️
• Make vue component names required. ✔️
• Standardize on plugin root component names. PluginNameRoot. ✔️
• Enforce vue filename conventions. ✔️
• Make component registration PascalCase. ✔️

Follow up

• Enable this rule once it is merged. (⭐️New: Add vue/component-name-in-template-casing vuejs/eslint-plugin-vue#397)

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Contributor Checklist

• Contributor has fully tested the PR manually
• 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 there are any front-end changes, before/after screenshots are included
• If this is an important user-facing change, PR or related issue has a 'changelog' label

Reviewer Checklist

• Automated test coverage is satisfactory
• Reviewer has fully tested the PR manually
• PR has been tested for accessibility regressions
• External dependencies files were updated (yarn and pip)
• Documentation is updated
• Link to diff of internal dependency change is included
• CHANGELOG.rst is updated for high-level changes
• Contributor is in AUTHORS.rst

[codecov]

Codecov Report

Merging #4034 into develop will increase coverage by 0.1%.
The diff coverage is 43.29%.

@@            Coverage Diff             @@
##           develop    #4034     +/-   ##
==========================================
+ Coverage    49.91%   50.01%   +0.1%     
==========================================
  Files          628      628             
  Lines        20827    20828      +1     
  Branches      2688     2688             
==========================================
+ Hits         10395    10417     +22     
+ Misses        9760     9742     -18     
+ Partials       672      669      -3

Impacted Files	Coverage Δ
...ment/assets/src/state/actions/deviceInfoActions.js	0% <ø> (ø)	⬆️
...sets/src/views/buttons-and-links/KExternalLink.vue	100% <ø> (ø)
...s/document_pdf_render/assets/src/views/PdfPage.vue	0% <ø> (ø)
kolibri/core/assets/src/views/ElapsedTime.vue	57.14% <ø> (ø)
kolibri/core/assets/src/views/KCheckbox.vue	78.94% <ø> (ø)
kolibri/core/assets/src/views/KCircularLoader.vue	100% <ø> (ø)
kolibri/core/assets/src/views/KRadioButton.vue	80% <ø> (ø)
kolibri/core/assets/src/views/CoreMenu/index.vue	16.66% <ø> (ø)
kolibri/core/assets/src/views/ProgressBar.vue	100% <ø> (ø)
.../facility_management/assets/src/views/UserRole.vue	0% <ø> (ø)
... and 265 more

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[indirectlylit]

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