feat(02-03): add Groq, Replicate, Anyscale provider YAMLs

- Groq: gsk_ prefix, 52 chars (high confidence)
- Replicate: r8_ prefix, 37 chars (high confidence)
- Anyscale: esecret_ prefix (high confidence)
- Dual-located in providers/ and pkg/providers/definitions/

providers/replicate.yaml

@@ -0,0 +1,21 @@
+format_version: 1
+name: replicate
+display_name: Replicate
+tier: 2
+last_verified: "2026-04-05"
+keywords:
+  - "r8_"
+  - "replicate"
+  - "REPLICATE_API_TOKEN"
+  - "api.replicate.com"
+patterns:
+  - regex: 'r8_[0-9A-Za-z\-_]{37}'
+    entropy_min: 3.5
+    confidence: high
+verify:
+  method: GET
+  url: https://api.replicate.com/v1/predictions
+  headers:
+    Authorization: "Bearer {KEY}"
+  valid_status: [200]
+  invalid_status: [401, 403]