* feat: unified datachange from changeData, addData, updateData, and removeData; feat: item definition and first drawing
* feat: update canvas while addData; feat: update canvas while updateData (node); chore: unified additems, removeitems, updateitems to be itemchange hook
* feat: node and edge updating and drawing
* chore: neaten
* feat: draw and update labels for node and edge
* feat: icon for edge; feat: custom node and edge and register to lib
* feat: state related API for graph and item
* chore: update notes
* feat: state styles for item
* chore: update tests
* feat: implement add remove and update API for graph data module
* chore: remove IItem INode IEdge and ICombo from input and output of API in graph
* docs: udpate temporary graph api docs
* feat: hooks for graph; feat: data and interaction controllers for these two types of extensions
* chore: format notes
* perf: types refine
* feat: graph behavior apis
* feat: item and its controller
* feat: init Node Edge and Combo item
* feat: init layoutm theme, extension controllers
* feat: init Graph class
* feat: add gymnastics for behavior
* chore: behavior type generic refine
* chore: refine
* feat: complete hooks list
