Dandelion Mané 6c5e8b70d6 graph: add descriptions
This updates the graph `Node` type to include a string description.

The description should be a brief (ideally oneline) string giving
context on what the node is. All planned frontends will support
markdown, so linking to context (e.g. linking to the issue corresponding
to an ISSUE type node) is supported.

This commit updates the Git and GitHub plugins to use the new
description field.

Test plan: `yarn test --full` passes, and I've inspected snapshots and
made sure they look reasonable.
2019-07-04 13:44:28 +03:00
..