docs(llms): generate llms.txt from content (#3246)

docs/modules/llms/module.ts

@@ -0,0 +1,47 @@
+import { addPrerenderRoutes, addServerScanDir, createResolver, defineNuxtModule, useLogger } from '@nuxt/kit'
+import type { SQLOperator } from '@nuxt/content'
+
+export interface ModuleOptions {
+  domain: string
+  sections: Array<{
+    title: string
+    collection: string
+    description?: string
+    filters?: Array<{
+      field: string
+      operator: SQLOperator
+      value?: string
+    }>
+  }>
+  title?: string
+  description?: string
+  notes?: string[]
+}
+
+export default defineNuxtModule({
+  meta: {
+    name: 'llms',
+    configKey: 'llms'
+  },
+  setup(options, nuxt) {
+    const { resolve } = createResolver(import.meta.url)
+    const logger = useLogger('llms')
+
+    nuxt.options.runtimeConfig.llms = {
+      domain: options.domain,
+      title: options.title,
+      description: options.description,
+      notes: options.notes,
+      sections: options.sections || [{ title: 'Docs', collection: 'content' }]
+    }
+
+    if (!options.domain) {
+      logger.warn('Please provide a domain for the LLMs module. LLMS docs require a domain to be set.')
+    }
+
+    addServerScanDir(resolve('runtime/server'))
+
+    addPrerenderRoutes('/llms.txt')
+    addPrerenderRoutes('/llms_full.txt')
+  }
+})