Make transferFlags a multivariate function

It is not uncommon to transfer the flags from multiple fields to one target, e.g tansferFlags(field=["a", "b", "c"], target="x"). Currently we only support this by calling transferFlagsmultiple times, which might trash up the history with empty columns. This MR makestransferFlags` a function supporting the projection of flags from many to one.

docs/requirements.txt

@@ -4,11 +4,11 @@
 
 recommonmark==0.7.1
 sphinx==7.2.6
-sphinx-automodapi==0.16.0
+sphinx-automodapi==0.17.0
 sphinxcontrib-fulltoc==1.2.0
 sphinx-markdown-tables==0.0.17
 jupyter-sphinx==0.5.3
-sphinx_autodoc_typehints==1.25.2
-sphinx-tabs==3.4.4
+sphinx_autodoc_typehints==2.0.0
+sphinx-tabs==3.4.5
 sphinx-design==0.5.0
-pydata-sphinx-theme==0.14.4
+pydata-sphinx-theme==0.15.2