Adds the "Corners of Edge" topology node to geometry nodes. Combining this node with the "Face of Corner" node allows getting informations about the faces connected to an edge. The behavior is slightly non-obvious-- the node only gives the corner neighbors that come *before* the current edge in directly neighboring faces. This allows the operation to be easily reversed and reduces redundancy between nodes. See the devtalk thread: https://devtalk.blender.org/t/29379 Pull Request: https://projects.blender.org/blender/blender/pulls/107968