fix: Windows execvpe doesn't work as expected

src/pixi_kernel/__main__.py

@@ -1,5 +1,7 @@
 import logging
 import os
+import platform
+import subprocess
 import sys
 import typing
 from pathlib import Path
@@ -60,7 +62,13 @@ def main() -> None:
         env["R_LIBS_USER"] = r_libs_path
 
     logger.info(f"launching {kernel_display_name} kernel with {args}")
-    os.execvpe("pixi", args, env)
+
+    if platform.system() == "Windows":
+        executable = subprocess.Popen(args, env=env)
+        return_code = executable.wait()
+        sys.exit(return_code)
+    else:
+        os.execvpe("pixi", args, env)
 
 
 if __name__ == "__main__":