Clear and concise description of the problem

Many people I've read, including myself, dislike the overuse of dollar sign for everything magic or reactivity related.
So that leave us with only * and ::, which I find visually unappealing.

Suggested solution

Please, add :@, as it's clearly a combination of v-bind and v-on, exactly what v-model does, so both symbols are already being used separately, and it's more visually appealing.

<q-input :@="email" />

This aligns with another proposal in the vuejs repo.

Alternative

No response

Additional context

No response

Validations

• Follow our Code of Conduct
• Read the Contributing Guide.
• Check that there isn't already an issue that request the same feature to avoid creating a duplicate.