lib.Uri.basename: Add property

Add a property to get a file's basename. For
https://host.com/path/to/file?key=val
.basename should return "file"".
Signed-off-by: Jan Lindemann <jan@janware.com>

src/python/jw/pkg/lib/Uri.py

@@ -104,6 +104,10 @@ class Uri:
     def path(self) -> str:
         return self.__p.path
 
+    @cached_property
+    def basename(self) -> str:
+        return self.__p.path.rsplit('/')[-1]
+
     @cached_property
     def authority(self) -> str:
         return self.__assemble(scheme=False, credentials=True, secure=False, path=False)