ComfyUI-Manager clones the whole repo into custom_nodes/comfyui-mbqwedge/ and
needs __init__.py directly at that root. Move the node package (__init__.py,
mbq_wedge.py, js/) up to repo root, and the viewer (mbq_viewer.py,
mbq_functions.py, mbq_parser.py) into viewer/. Swap the two requirements.txt
files accordingly (node needs none, viewer needs pyside6/send2trash) and fold
the node's README content into the root README, which remains the single
source of truth for both.