Converted the following remaining "stashed" examples to Storybook:
- GraphLayout
- HtmlLabel
- MenuStyle
- ShowRegion
- Scrollbars (is starting to display, but appears to have a bug where `<g>` elements are inserted outside of the `<svg>` element)
- Wires
The examples are still not fully working. As the mxGraph examples were previously migrated to nextjs/react, some original code may not have been ported correctly.
Additional changes in @maxgraph/core:
- Fixes the default parameters in `MaxPopupMenu` and `Morphing` to restore the original `mxGraph` behavior.
- Graph: add new "create*" factory methods to ease the extension:
- createEdgeHandlerInstance(state: CellState): EdgeHandler
- createGraphDataModel(): GraphDataModel
- createSelectionModel()
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Co-authored-by: Thomas Bouffard <27200110+tbouffard@users.noreply.github.com>