feat: Add Cython::Cython imported target

Co-authored-by: Jean-Christophe Fillion-Robin <[email protected]>

src/cython_cmake/cmake/FindCython.cmake

@@ -13,6 +13,11 @@
 #  ``CYTHON_FOUND``
 #    true if the program was found
 #
+# And the following target:
+#
+#  ``Cython::Cython``
+#    The Cython executable
+#
 # For more information on the Cython project, see https://cython.org/.
 #
 # *Cython is a language that makes writing C extensions for the Python language
@@ -84,6 +89,15 @@ find_package_handle_standard_args(Cython
   VERSION_VAR ${CYTHON_VERSION}
 )
 
+if(CYTHON_FOUND)
+  if(NOT DEFINED Cython::Cython)
+    add_executable(Cython::Cython IMPORTED)
+    set_target_properties(Cython::Cython PROPERTIES
+        IMPORTED_LOCATION "${CYTHON_EXECUTABLE}"
+    )
+  endif()
+endif()
+
 mark_as_advanced(CYTHON_EXECUTABLE)
 
 include(UseCython)