New theme added to theme.py: FomanticUI

Author: princerb

flask_admin/theme.py

@@ -17,4 +17,10 @@ class BootstrapTheme(Theme):
     fluid: bool = False
 
 
+@dataclass
+class FomanticUI(Theme):
+    folder: typing.Literal["fomanticui"] = 'fomanticui'
+    base_template: str = "admin/base.html"
+
+
 Bootstrap4Theme = partial(BootstrapTheme, folder="bootstrap4")