New Geometry node "Dynamic edit" to enable viewport editing in 2.92

As Only working with nodes is not possible, therefore a special node called "Dynamic edit" should be design. If the user connect this node in between the two node then the previous node branches should pack into a single Special node called "Node history" and as soon as we connect the dynamic edit node, the mesh should become editable at that point in the viewport.

The idea behind "Dynamic input" is that user can edit the geometry created till that node point and after this further node based working can be done. this will also helpful in defining vertex group, edge group, face map created in the viewport.

The concept of node history is that it will act as a backup if something wrong happens (by default the node history should not editable but if user want to forcefully edit he has to Ctrl-Click on that to edit it so that he is aware of the fact that any changes in the history will make the future nodes behave strangely). the "node history" node should be different shape like triangle/Circle so that it visible differently.

There are two possible options to achieve similar results

1. Two node can be combined in a single node called dynamic edit and in this node, a tab called node history should be present to edit the history of previous node.This idea is inspired from 3ds max edit poly modifier which acts as a buffer between modifiers in the modifier stack and helps to make the mesh non-destructive as much as possible.

2. Another alternative is to connect the shape key in between two nodes.

Node name can be: (1) Dynamic edit (2) Dynamic Bridge (3) Mesh Bridge (4) Node bridge