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Add the Mirror node
This node should take in vector data, a boolean for "Mirror X", and a boolean for "Mirror Y". The centre of transformation should probably be around the pivot (indicated in the document with a blue circle inside another blue circle).
If both mirror x and y are active, 4 copies of the vector data will be output. The default values should be true for mirror x and false for mirror y. This is similar to the mirror node in blender.
A guide to the node system can be found https://github.com/GraphiteEditor/Graphite/blob/master/node-graph/README.md - if you have any questions please ask in the discord chat.
Steps:
- Define a new node that just outputs the vector data that has been input (to ensure nodes are set up properly). This is similar to the circular repeat node.
- Compute the pivot position of the vector data using the appropriate function. You can log this to ensure that it is correct.
- Clone the subpaths in the vector data and mirror all of the positions around the computed pivot. You may need to modify the bézier_rs library and the VectorData struct.
