chore: normalize all tracked files to LF line endings

Mechanical application of the `.gitattributes` rules from the prior commit.
All 50 files differ only in line endings — verified by
`git diff --cached --ignore-all-space` being empty.

Before: main had 42 CRLF + 27 LF Python files plus mixed-ending in YAML,
templates, and shell scripts. After: every text file is LF (except the
Windows-native *.ps1, *.bat scripts which remain CRLF per gitattributes).

This eliminates the noisy-diff failure mode seen in PR #102, where a
small logic change produced a 918-line diff due to whole-file CRLF→LF
conversion.

python/kicad_api/__init__.py

@@ -1,27 +1,27 @@
-"""
-KiCAD API Abstraction Layer
-
-This module provides a unified interface to KiCAD's Python APIs,
-supporting both the legacy SWIG bindings and the new IPC API.
-
-Usage:
-    from kicad_api import create_backend
-
-    # Auto-detect best available backend
-    backend = create_backend()
-
-    # Or specify explicitly
-    backend = create_backend('ipc')  # Use IPC API
-    backend = create_backend('swig')  # Use legacy SWIG
-
-    # Connect and use
-    if backend.connect():
-        board = backend.get_board()
-        board.set_size(100, 80)
-"""
-
-from kicad_api.base import KiCADBackend
-from kicad_api.factory import create_backend
-
-__all__ = ["create_backend", "KiCADBackend"]
-__version__ = "2.0.0-alpha.1"
+"""
+KiCAD API Abstraction Layer
+
+This module provides a unified interface to KiCAD's Python APIs,
+supporting both the legacy SWIG bindings and the new IPC API.
+
+Usage:
+    from kicad_api import create_backend
+
+    # Auto-detect best available backend
+    backend = create_backend()
+
+    # Or specify explicitly
+    backend = create_backend('ipc')  # Use IPC API
+    backend = create_backend('swig')  # Use legacy SWIG
+
+    # Connect and use
+    if backend.connect():
+        board = backend.get_board()
+        board.set_size(100, 80)
+"""
+
+from kicad_api.base import KiCADBackend
+from kicad_api.factory import create_backend
+
+__all__ = ["create_backend", "KiCADBackend"]
+__version__ = "2.0.0-alpha.1"