feat: add Moonshot and Kimi Code declarative providers (#7304)

Co-authored-by: Douwe Osinga <douwe@squareup.com>

crates/goose/src/providers/declarative/kimi.json

@@ -0,0 +1,19 @@
+{
+    "name": "Kimi",
+    "metadata": {
+        "homepage": "https://kimi.ai",
+        "docs": "https://platform.moonshot.cn/docs/intro",
+        "description": "Kimi Code AI models optimized for coding tasks"
+    },
+    "engine": {
+        "type": "openai",
+        "base_url": "https://api.moonshot.cn/v1",
+        "api_key_env_var": "MOONSHOT_API_KEY"
+    },
+    "models": [
+        {"name": "kimi-for-coding", "context_limit": 262144},
+        {"name": "kimi-code", "context_limit": 262144}
+    ],
+    "streaming_default": true,
+    "pricing_info_url": "https://platform.moonshot.cn/pricing"
+}

crates/goose/src/providers/declarative/moonshot.json

@@ -0,0 +1,23 @@
+{
+    "name": "Moonshot",
+    "metadata": {
+        "homepage": "https://kimi.moonshot.cn/",
+        "docs": "https://platform.moonshot.cn/docs/intro",
+        "description": "Moonshot AI (Kimi) models"
+    },
+    "engine": {
+        "type": "openai",
+        "base_url": "https://api.moonshot.cn/v1",
+        "api_key_env_var": "MOONSHOT_API_KEY"
+    },
+    "models": [
+        {"name": "kimi-latest", "context_limit": 131072},
+        {"name": "kimi-thinking-preview", "context_limit": 131072},
+        {"name": "kimi-k2-0711", "context_limit": 131072},
+        {"name": "kimi-k2", "context_limit": 262144},
+        {"name": "moonshot-v1-8k", "context_limit": 8192},
+        {"name": "moonshot-v1-32k", "context_limit": 32768}
+    ],
+    "streaming_default": true,
+    "pricing_info_url": "https://platform.moonshot.cn/pricing"
+}