Geometric grids nodes

Hello everyone, I've created two new nodes for you: a hexagonal grid and an icosahedral grid. While these could be made in the tile sampler, it's quite inconvenient to adjust and edit them there. My nodes make everything simple with minimal settings for the most important parameters.

The most significant addition is the `mode_ornament` option, which allows you to rotate the grid elements in specific ways – something impossible to achieve with the standard SD nodes.

Feel free to use them and create new patterns for your materials. I've included numerous pattern examples to help you quickly grasp how to control these nodes, along with a few default materials based on them.

Two quick videos demonstrating the nodes in action are available here: https://www.artstation.com/artwork/OGbzAv