Forbid `index` files

[EvgenyOrekhov]

See https://marvinh.dev/blog/speeding-up-javascript-ecosystem-part-7/

Also maybe add some more filename rules: https://npmtrends.com/eslint-plugin-check-file-vs-eslint-plugin-filename-rules-vs-eslint-plugin-filenames-vs-eslint-plugin-filenames-simple-vs-eslint-plugin-project-structure

Notes:

• eslint-plugin-barrel-files
• There's filename-no-index rule in eslint-plugin-canonical

[EvgenyOrekhov]

Hi @alexkramer98! What about index.ts files? Are there cases that require usage of index.ts files in Vue 3/Nuxt 3?

[alexkramer98]

Not as far as I am aware. I don't believe I've encountered them in Vue 3/Nuxt yet.