[feature] project page support directory

[zhangweiqaz]

Is your feature request related to a problem? Please describe. [A clear and concise description of what the problem is. Ex. I'm always frustrated when ... ] when project over 50 ，it is hard to find it quickly. I think to put some projects to directory is a good way to avoid that problem, also please consider to make a tree view as the default project page view

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