Reroute edges of sfnetwork objects

[luukvdmeer]

Is your feature request related to a problem? Please describe.
In tidygraph, the reroute() verb enables to change the terminal nodes of edges. For example, you can reverse edges with reroute(to = from, from = to). When having spatially explicit edges in an sfnetwork object, rerouting should not just mean changing the from and to columns, but also the geometry column. In the case of reversion, this would mean applying st_reverse() to the geometries.

Describe the solution you'd like
An sfnetwork method for tidygraphs reroute() function, that takes into account the above (only when edges are spatially explicit).

[luukvdmeer]

Marked as duplicate of #29