Rendering the git graph on the server means that we can properly track flows and switch from the Canvas implementation to a SVG implementation.
* This implementation provides a 16 limited color selection
* The uniqued color numbers are also provided
* And there is also a monochrome version
*In addition is a hover highlight that allows users to highlight commits on the same flow.
Closes#12209
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Signed-off-by: Andrew Thornton art27@cantab.net
Co-authored-by: silverwind <me@silverwind.io>
zeripath