New normal and center nodes

Created by: Durman

Problem statement

I'm thinking about combining this nodes into two and spread their logik on all mesh components (vertices, edges, faces).

|  Mesh normals      |
+--------------------+
|             normal +
|            tangent +
| modes:             |
| vert | edge | face |
+ verts              |
+ edges              |
+ faces              |

|  Mesh centers      |
+--------------------+
|             center +
|             matrix +
| modes:             |
| vert | edge | face |
+ verts              |
+ edges              |
+ faces              |

I would like to try implement this close to blender default behaviour in edit mode.