style: sort Python imports with isort

Add isort configuration (profile=black, line_length=100) to pyproject.toml,
add isort pre-commit hook, and auto-sort imports across all Python source files.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

python/commands/board/__init__.py

@@ -2,14 +2,16 @@
 Board-related command implementations for KiCAD interface
 """
 
-import pcbnew
 import logging
-from typing import Dict, Any, Optional
+from typing import Any, Dict, Optional
+
+import pcbnew
+
+from .layers import BoardLayerCommands
+from .outline import BoardOutlineCommands
 
 # Import specialized modules
 from .size import BoardSizeCommands
-from .layers import BoardLayerCommands
-from .outline import BoardOutlineCommands
 from .view import BoardViewCommands
 
 logger = logging.getLogger("kicad_interface")

python/commands/board/layers.py

@@ -2,9 +2,10 @@
 Board layer command implementations for KiCAD interface
 """
 
-import pcbnew
 import logging
-from typing import Dict, Any, Optional
+from typing import Any, Dict, Optional
+
+import pcbnew
 
 logger = logging.getLogger("kicad_interface")
 

python/commands/board/outline.py

@@ -2,10 +2,11 @@
 Board outline command implementations for KiCAD interface
 """
 
-import pcbnew
 import logging
 import math
-from typing import Dict, Any, Optional
+from typing import Any, Dict, Optional
+
+import pcbnew
 
 logger = logging.getLogger("kicad_interface")
 

python/commands/board/size.py

@@ -2,9 +2,10 @@
 Board size command implementations for KiCAD interface
 """
 
-import pcbnew
 import logging
-from typing import Dict, Any, Optional
+from typing import Any, Dict, Optional
+
+import pcbnew
 
 logger = logging.getLogger("kicad_interface")
 

python/commands/board/view.py

@@ -2,13 +2,14 @@
 Board view command implementations for KiCAD interface
 """
 
-import os
-import pcbnew
-import logging
-from typing import Dict, Any, Optional, List, Tuple
-from PIL import Image
-import io
 import base64
+import io
+import logging
+import os
+from typing import Any, Dict, List, Optional, Tuple
+
+import pcbnew
+from PIL import Image
 
 logger = logging.getLogger("kicad_interface")