feat: mockly-hono — file-based mock API server (Hono)

File path = route. JSON/JSON5, dynamic .ts handlers + faker, templating,
stateful CRUD (pagination/sort/persist), __variants, sequence, chaos,
rate-limit, auth, validation, per-route + global proxy/record, splat routes,
X-Scenario overlays, SSE. Visual docs (Scalar) at /__docs from a live
OpenAPI 3 spec. OpenAPI import script. Zero-build via tsx.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

routes/__test/echo.post.ts

@@ -0,0 +1,7 @@
+import type { MockContext } from '../../src/respond.ts'
+
+// feature: echo request — try:
+// curl -X POST localhost:4100/__test/echo -H 'content-type: application/json' -d '{"hi":1}'
+export default function ({ body, query, headers, method }: MockContext) {
+  return { method, received: body, query, contentType: headers['content-type'] ?? null }
+}