Add Nix derivations for generating Go and TypeScript API client
bindings from authentik's OpenAPI schema. Verified on ringtail:
- client-go: 886 .go files from openapi-generator-cli, with go.mod/go.sum
- client-ts: TypeScript fetch client with src/ and dist/ (tsc compiled)
- api-go-vendor-hook: setup hook to inject client-go into Go vendor dir
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>