Rule proposal: Require alt attribute for image tag

[TheAlexLichter]

Please describe what the rule should do:

Ensure there is a non-empty alt attribute when using the <img> tag.

What category of rule is this? (place an "X" next to just one item)

[X] Enforces code style
[ ] Warns about a potential error
[ ] Suggests an alternate way of doing something
[ ] Other (please specify:)

Provide 2-3 code examples that this rule will warn about:

<img src="path/to/my/src" alt="">

<img src="path/to/my/src">

[michalsnik]

Thanks for posting this proposal @manniL But there is already a dedicated plugin with accessibility rules, that has this rule: https://github.com/maranran/eslint-plugin-vue-a11y/blob/master/docs/rules/alt-text.md