feat: allow router instance in js/ts

[hairyf]

Currently, to use the router, you must pass the component's useRouter

I think we can export router instance for those who need

import { router } from 'valaxy/client'
router.push('...')

[YunYouJun]

router is from vue-router.

They behave exactly the same, and I think it's always correct to import from vue-router.

import { router } from 'vue-router'

[hairyf]

I think yes, as long as we can get it, but it doesn't seem to be supported at the moment

[YunYouJun]

Use it like this.

import { useRouter } from 'vue-router'
const router = useRouter()

[hairyf]

No, we can't get the router outside the component via useRouter, it only works during setup

[YunYouJun]

useRouter need and should only works durint setup.

Even if we export from Valaxy, it needs to be initialized in Setup.

[YunYouJun]

If you want a instance, this.$router can be achieved in Vue.

https://router.vuejs.org/guide/#javascript