feat: find gurobi in pixi environment

Author: coroa

src/pyoptinterface/_src/gurobi.py

@@ -2,6 +2,7 @@
 import platform
 from pathlib import Path
 import re
+import sys
 import logging
 from typing import Tuple, Union, overload
 
@@ -81,6 +82,14 @@ def detected_libraries():
     except Exception:
         pass
 
+    # conda/pixi environment
+    prefix = Path(sys.prefix)
+    dir = prefix / subdir
+    for path in dir.glob(suffix_pattern):
+        match = re.match(libname_pattern, path.name)
+        if match:
+            libs.append(str(path))
+
     # default names
     gurobi_names = [
         "gurobi130",