feat: add config modules

backend/src/config/model_config.py

@@ -0,0 +1,26 @@
+from pydantic import BaseModel, ConfigDict, Field
+
+
+class ModelConfig(BaseModel):
+    """Config section for a model"""
+
+    name: str = Field(..., description="Unique name for the model")
+    display_name: str | None = Field(
+        ..., default_factory=lambda: None, description="Display name for the model"
+    )
+    description: str | None = Field(
+        ..., default_factory=lambda: None, description="Description for the model"
+    )
+    use: str = Field(
+        ...,
+        description="Class path of the model provider(e.g. langchain_openai.ChatOpenAI)",
+    )
+    model: str = Field(..., description="Model name")
+    model_config = ConfigDict(extra="allow")
+    supports_thinking: bool = Field(
+        default_factory=lambda: False, description="Whether the model supports thinking"
+    )
+    when_thinking_enabled: dict | None = Field(
+        default_factory=lambda: None,
+        description="Extra settings to be passed to the model when thinking is enabled",
+    )