refactor(open-sse): P3 provider registry — split into providers/registry/{id}.js

- 100 registry files: transport + models co-located per provider (Mongoose-style)
- providers/shared.js: shared Claude headers + OS/arch helpers (deduped)
- providers/models/helpers.js: withCodexReviewModels (kept dynamic)
- providers/index.js builds PROVIDERS + PROVIDER_MODELS = old API (content byte-for-byte)
- config/providers.js + providerModels.js → barrel re-export, keep accessors + runtime helpers
- Verified: PROVIDERS/MODELS/OAuth/alias byte-for-byte, golden translator tests pass, 0 new regression

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

open-sse/providers/registry/kilocode.js

@@ -0,0 +1,42 @@
+export default {
+  "id": "kilocode",
+  "alias": "kc",
+  "transport": {
+    "baseUrl": "https://api.kilo.ai/api/openrouter/chat/completions",
+    "headers": {}
+  },
+  "models": [
+    {
+      "id": "anthropic/claude-sonnet-4-20250514",
+      "name": "Claude Sonnet 4"
+    },
+    {
+      "id": "anthropic/claude-opus-4-20250514",
+      "name": "Claude Opus 4"
+    },
+    {
+      "id": "google/gemini-2.5-pro",
+      "name": "Gemini 2.5 Pro"
+    },
+    {
+      "id": "google/gemini-2.5-flash",
+      "name": "Gemini 2.5 Flash"
+    },
+    {
+      "id": "openai/gpt-4.1",
+      "name": "GPT-4.1"
+    },
+    {
+      "id": "openai/o3",
+      "name": "o3"
+    },
+    {
+      "id": "deepseek/deepseek-chat",
+      "name": "DeepSeek Chat"
+    },
+    {
+      "id": "deepseek/deepseek-reasoner",
+      "name": "DeepSeek Reasoner"
+    }
+  ]
+};