fix: format code with black

Author: Attack825

src/casibase_python_sdk/prompt.py

@@ -12,6 +12,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+
 class Prompt:
     def __init__(
         self,

src/casibase_python_sdk/properties.py

@@ -12,6 +12,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+
 class Properties:
     def __init__(
         self,

src/casibase_python_sdk/usage_info.py

@@ -12,6 +12,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+
 class UsageInfo:
     def __init__(
         self,