Add vue loader

What does this MR do?

• Adds support for .vue template files
• Updates eslint config to parse .vue templates
• Converts a few Vue components to .vue to test that this works

Does this MR meet the acceptance criteria?

• Changelog entry added, if necessary
• Documentation created/updated
• Tests
  • Added for this feature/bug
  • All builds are passing
• Conform by the merge request performance guides
• Conform by the style guides
• Branch has no merge conflicts with master (if it does - rebase it please)
• Squashed related commits together

What are the relevant issue numbers?

Closes #29519 (closed)