feat(02-01): record and replay one route through the summer CLI

- Add a generic tide flow schema with YAML fixture IO and HTTP record/replay
- Register parity:record and parity:replay on the bonfire summer tool
- Diff JSON scalars at $.path and non-JSON bodies at the changed byte offset

Co-authored-by: Cursor <cursoragent@cursor.com>

tide/testdata/one-route-spec.yaml

@@ -0,0 +1,9 @@
+version: 1
+name: one-route-sample
+description: Record a single GET /sample request
+steps:
+  - id: sample
+    route_id: GET /sample
+    request:
+      method: GET
+      path: /sample