feat: expose @vitejs/plugin-vue config

[ChrisShank]

Fixes #214

[antfu]

I personally don't feel it's good to be a root-level config option as it loses some context here. Maybe we can have a config entry that forwards the options for @vitejs/plugin-vue instead?

[ChrisShank]

@antfu Are there any other options from @vitejs/plugin-vue that you think would be beneficial to expose?

MaybetemplateCompiler.isCustomElement or template.compilerOptions.isCustomElement would be better?

[antfu]

I am thinking to have a top-level option vueOptions, where

 const vuePlugin = createVuePlugin({
    include: [/\.vue$/, /\.md$/],
    ...configs.vueOptions
  })

WDYT?

[ChrisShank]

Thanks for clarifying, makes sense to me. Ill update the PR later today!! 😃

[ChrisShank]

@kiaking @antfu Any other feedback for this?