Request function, add custom nodes masking

Because there are many, many plugins in manage, but there are many duplicate and useless plugins that will appear in it, request to add a function, such as adding a check, remove the check, you can not display the plugin in the machine,

Start by tracing ComfyUI-Manager’s custom-node listing and existing install, remove, disable, and enable flows. Clarify how a user-selected node should be marked and retained, then verify that masked nodes no longer appear and can be shown again when unmarked.

Written by the indexing model from the issue text.