Storage and browser window for community plugins and chain projects

[0x4E69676874466F78]

Related #786, #788 It would be possible to share both plugins and chain projects.

[RunDevelopment]

This is something I also want. I think that one of the greatest aspects of Chainner is that you can share (parts of) chains. I eventually want to add something like a VSCode marketplace (without the monetization) or npm or pip to Chainner. Sharing chains should be easy.

However, there are a lot of challenges associated with this, so this issue will be open for a while.

[joeyballentine]

On a related note, I've always wanted to have a model marketplace for downloading and sharing models as well. Again something that won't be for a while, but it could all be contained in a single chaiNNer marketplace kind of thing