simple grants graph tool for grants 2

[owocki]

build a tool that can show contributions like this ( https://twitter.com/owocki/status/1540257178233106433 ) but for grants protocol

built on top of this

1. https://github.com/gitcoinco/grants-round
2. https://github.com/gitcoinco/grant-hub

how its implemented in grants 1:

1. https://github.com/gitcoinco/web/blob/master/app/dataviz/templates/dataviz/mesh.html#L58-L60
2. https://github.com/gitcoinco/web/blob/master/app/assets/v2/js/admin/graph.min.js is the graphing frameowrk