added a type for defaultNodeData, this can house common data that all nodes should have. the other types can build on this defaultData. Also added an endNode and phaseNode to NodeDefinitions.tsx, together with a nodeData type for each new node type.
ref: N25B-114
changed to startNode file to be a general file for custom node types, and created a custom type for the data property of StartNode.
BREAKING: renamed StartNode.tsx to NodeDefinitions.tsx
ref: N25B-114
Changing pages now happens via Link, directory has gotten a layout change with app becoming a starting point and every page requireing their own .tsx and .css file.
Components have also been added where reocurring componennts can be made and reapplied in the project.
ref: N25B-96
Added ReactFlow to dependencies (@xyflow/react).
Added a basic reactflow template to test functionality of reactFlow and to build the visual programming UI on top of.
ref: N25B-114