feat: add response models for endpoints returning untyped objects

gns3server/schemas/controller/gns3vm.py

@@ -55,3 +55,24 @@ class GNS3VM(BaseModel):
     vcpus: Optional[int] = Field(None, description="Number of CPUs to allocate for the GNS3 VM")
     ram: Optional[int] = Field(None, description="Amount of memory to allocate for the GNS3 VM")
     port: Optional[int] = Field(None, gt=0, le=65535)
+
+
+class GNS3VMEngineInfo(BaseModel):
+    """
+    A virtualization engine supported by the GNS3 VM.
+    """
+
+    engine_id: str = Field(..., description="Engine identifier")
+    name: str = Field(..., description="Engine display name")
+    description: str = Field(..., description="Engine description (may contain HTML)")
+    support_when_exit: bool = Field(..., description="The engine supports the 'when exit' action")
+    support_headless: bool = Field(..., description="The engine supports headless mode")
+    support_ram: bool = Field(..., description="The engine supports RAM and vCPUs allocation")
+
+
+class GNS3VMInfo(BaseModel):
+    """
+    A virtual machine available on a virtualization engine.
+    """
+
+    vmname: str = Field(..., description="Virtual machine name")