feat(downloads): add remote download workers

scripts/generate-downloader-openapi.ts

@@ -0,0 +1,7 @@
+import { mkdir, writeFile } from 'node:fs/promises'
+import { dirname, resolve } from 'node:path'
+import { downloaderOpenAPIDocument } from '../server/openapi/downloader'
+
+const output = resolve('docs/openapi/downloader.json')
+await mkdir(dirname(output), { recursive: true })
+await writeFile(output, `${JSON.stringify(downloaderOpenAPIDocument(), null, 2)}\n`)