Analyze dependencies of cargo projects

Add support for generating treemaps

A very good starting point, and potentially the last visualization style to add for now. As pointed out in discussions on rust-lang Zulip, there is a tradeoff to duplicated dependencies that may need revisiting in the future - the current approach of dividing the size by the number of dependents is good but not always the 'correct' method.

Created by  finchie  on April 29, 2024
XVQXXAGZ4WHBQIU3WEUKLZX6FKV5V52LSTTGMFXR42WPWJZJNENQC
Change contents