Content v3 setup

1. Install @nuxt/content@^3 and nuxt-toc
2. Register both modules
3. Add content.config.ts with at least one page collection
4. For SQLite adapters in some environments, install better-sqlite3 as needed by Content

// nuxt.config.ts
export default defineNuxtConfig({
  modules: ['nuxt-toc', '@nuxt/content'],
  nuxtToc: { collection: 'content' },
})

// content.config.ts
import { defineContentConfig, defineCollection } from '@nuxt/content'

export default defineContentConfig({
  collections: {
    content: defineCollection({
      type: 'page',
      source: '**/*.md',
    }),
  },
})