Add .pth encoding to compat.py312

Author: abravalheri

setuptools/compat/py312.py

@@ -0,0 +1,11 @@
+import sys
+
+if sys.version_info >= (3, 13):
+    # Python 3.13 should support `.pth` files encoded in UTF-8
+    # See discussion in https://github.com/python/cpython/issues/77102
+    PTH_ENCODING = "utf-8"
+else:
+    from .py39 import LOCALE_ENCODING
+
+    # PTH_ENCODING = "locale"
+    PTH_ENCODING = LOCALE_ENCODING