Update Vue dependencies, tests, and documentation. Fix text interpolation in code blocks.

[jhildenbiddle]

Summary

• Remove Vue v2 dependencies, tests, and documentation
  Vue.js v2 has reached EOL status.

• Update Vue v3 dependencies, tests, and documentation

• Support Vue text interpolation in code blocks
  See Vue template doesn't work in markdown code block. #1812 for details. This is now supported by wrapping a code block in an element with a v-template attribute:

  <div v-template>
  
  ```
  {{ message}}
  ```
  
  </div>

Related issue, if any:

#1812

What kind of change does this PR introduce?

Bugfix (in docs)
Build-related changes
Docs

For any code change,

• Related documentation has been updated, if needed
• Related tests have been added or updated, if needed

Does this PR introduce a breaking change?

No

Tested in the following browsers:

• Chrome
• Firefox
• Safari
• Edge

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Name	Status	Preview	Comments	Updated (UTC)
docsify-preview	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	May 17, 2024 8:58pm

[Koooooo-7]

LGTM. 👍