docs: add v-model.lazy note for custom Vue components

[sadeghbarati]

v-model in components is just sugar syntax, it doesn't support modifiers

If you look at these links v-model modifiers will not work on custom Vue components like Input

• Vuetify Input Playground

• ElementPlus Input Playground

I thought it would be better to mention this in the docs of how to work with lazy inputs without v-model.lazy modifier in Input component and VeeValidate forms

[zernonia]

Actually v-model modifiers does work on Vue SFC.

It might just required some extra work to forward the similar v-model feature

[sadeghbarati]

You are right, I'm aware of that doc link I forgot to mention it in PR description

I'm trying to point to "required some extra work" that not exist yet, here 😄