fix: A property hidden bug.
fix: A name mistake.
mov: Refactored the widget's structure.
opt: The widget's scripts namespace.
mov: Rename the 'get_pdoc' method.
opt: The namespace of widget scripts.
add: The protocol of pdoc.
add: Implemented the basic pdoc protocol.
doc: More details.
opt: Unify the PDT namespace.
doc: Widget namespace.