Register router after Pinia store

Created by: deepakduggirala

We're unable to use Pinia stores inside router.beforeEach because router is created before pinia stores in ui/src/main.js, ui/src/router/index.js.

Create router after the line app.use(createPinia()).

Problems with using ToastStore in services were also observed when tweaking router/index.js - https://github.com/IUSCA/bioloop/issues/68

PS: ui/src/services/api.js imports router. router.push can be replaced with window.location.href