feat(pwa): add before install prompt support

[userquin]

This PR moves the pwa module to a composable adding a new PWABadge.vue component, registered via ClientOnly wrapper in both layouts in the App.vue component.

Looks like auto-import augmenting @vue/runtime-core instead vue module: added the hint (disabled: check the header and the footer) to fix this in shims.d.ts (check nuxt/nuxt#28542 (comment), nuxt/nuxt#28542 (comment) and https://vuejs.org/guide/typescript/options-api#augmenting-global-properties)

[userquin]

This PR enables the vue module augmentation fix, you can remove it from shims.d.ts: if you need to use $route or similar in your templates, TypeScript/ESLint will complain in VSCode/IntelliJ/WebStorm since auto import augmenting @vue/runtime-core and this is wrong (will break any vue module augmentation)