fix(x402 docs): Adding common LLM discovery documentation

scripts/build-discovery-artifacts.js

@@ -0,0 +1,21 @@
+/*
+  Build discovery endpoint artifacts from apiDoc source annotations.
+*/
+
+import { mkdirSync, writeFileSync } from 'fs'
+import { dirname, resolve } from 'path'
+
+import { buildDiscoveryDocuments } from '../src/discovery/build-documents.js'
+
+function main () {
+  const outputPath = resolve(process.cwd(), 'docs/discovery-artifacts.json')
+  const docs = buildDiscoveryDocuments()
+
+  mkdirSync(dirname(outputPath), { recursive: true })
+  writeFileSync(outputPath, `${JSON.stringify(docs, null, 2)}\n`)
+
+  // eslint-disable-next-line no-console
+  console.log(`Wrote discovery artifacts to ${outputPath}`)
+}
+
+main()