feat: generate page files for page types

[angeloashmore]

Resolves: #61

Description

Automatically generate framework-appropriate page files when page types are synced. Each adapter (Next.js, Nuxt, SvelteKit) creates minimal page templates matching the route derived in prismic.config.json, so developers get working pages out of the box after syncing their content models.

Note: E2E tests only cover Next.js App Router without JavaScript for now. Expanding the test suite will come later.

Checklist

• A comprehensive Linear ticket, providing sufficient context and details to facilitate the review of the PR, is linked to the PR.
• If my changes require tests, I added them.
• If my changes affect backward compatibility, it has been discussed.
• If my changes require an update to the CONTRIBUTING.md guide, I updated it.

Preview

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Note

Medium Risk
Medium risk: adds new file-generation behavior across Next.js/Nuxt/SvelteKit adapters based on routing rules, which could create files in unexpected paths or generate incorrect templates for some project setups. Changes are additive and avoid overwriting existing files, limiting impact.

Overview
Automatically scaffolds framework page files when a Prismic Custom Type with format: "page" is created/synced, using the route derived from prismic.config.json (via exported buildRoutePath).

Adds new page templates for Next.js (App Router + Pages Router, JS/TS, repeatable vs single), Nuxt (repeatable vs single, JS/TS), and SvelteKit (generates both +page.svelte and +page.server.*). Generation is non-destructive: adapters skip writing if the target page file already exists.

Extends E2E test utilities with stubNodeModule and a toHaveFile matcher, and adds sync tests (currently covering Next.js App Router) to verify page files are created for page types, not created for non-page types, and not overwritten.

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Cursor Bugbot has reviewed your changes and found 1 potential issue.

There are 2 total unresolved issues (including 1 from previous review).

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