[FIX] Update pages path to match the default one

[rashidlaasri]

This PR renames the pages from pages to Pages in the resources/js to align with the default Inertia setup.

Currently, if you create an Inertia test to check if a component is rendered, it fails with a “component not found” error. This happens because Inertia looks for /js/Pages/, while the Starter Kit uses /js/pages/.

$this->get('/podcasts/41')
    ->assertInertia(fn (Assert $page) => $page
        ->component('Podcasts/Show')
        ->has('podcast')
    );

Right now, there are workarounds, but they require extra steps that shouldn't be necessary if we use the default Inertia path.

1. Publish Inertia config file and update the value:

'page_paths' => [
    resource_path('js/pages'),
],

2. Override the config file at run time:

config()->set('inertia.testing.page_paths', [resource_path('js/pages')])

While both these changes work, it feels like an extra step (a little bit hacky too) that shouldn't be needed if we used the default path.

Changes in this PR:

✅ Renames the folder to match Inertia’s default path.
✅ Updates app.ts to reflect this change.

This ensures consistency and prevents unnecessary setup issues for users. 🚀