Disallow all link components except <VLink> with eslint rule

[zackkrida]

Fixes

Related to #871

Description

This PR adds a custom vue eslint rule disallowing usage of raw <a> tags and encouraging the use of <VLink> instead.

Testing Instructions

Try adding this code <a href="cool">cool</a> to any Vue component in a text editor where you receive eslint messages and observe the correct eslint error:

Suggestions are welcome regarding the error message or lint rule implementation. I didn't dive into the vue-eslint AST¹ too deeply so there may be a more specific rule we'd like to use.

Checklist

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• I added or updated tests for the changes I made (if applicable).
• I added or updated documentation (if applicable).
• I tried running the project locally and verified that there are no visible errors.

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Footnotes

1. https://github.com/vuejs/vue-eslint-parser/blob/master/docs/ast.md ↩

[obulat]

Can we add NuxtLink, too?

[zackkrida]

@obulat added RouterLink too, just to be safe. Great suggestion. Note that the PascalCase names are pascalcase in the AST. We could also add additional rules for router-link and nuxt-link but ideally those would be caught by the no-kebab-case rule and then picked up by this one.

[obulat]

Works great! Love the router-link addition for anyone who really wants to break the rules :)
You can still create an a link using <Component :is="'a'">Link</Component>. Which is good, because otherwise you would have to suppress this rule inside the VLink component itself.