dev-api: add developer portal, OpenAPI spec, and Flatenbadet case study

- New /developers/ page with API docs, SDKs, pricing, use cases
- OpenAPI 3.0 spec for Orders, Missions, Photos, Analytics
- Case study: Glasskiosken i Flatenbadet — complete ROI analysis
- Updated /order/ with recurring missions and frequency dropdown

services/frilans-payout/node_modules/loupe/lib/arguments.js

@@ -0,0 +1,7 @@
+import { inspectList } from './helpers'
+
+export default function inspectArguments(args, options) {
+  if (args.length === 0) return 'Arguments[]'
+  options.truncate -= 13
+  return `Arguments[ ${inspectList(args, options)} ]`
+}