Migrate styling UI panels to styled type atoms

[kmcginnes]

Description

The NodesStyling and EdgesStyling panels currently read from mergedConfigurationSelector and displayVertexTypeConfigSelector to get combined schema + style data. These should be migrated to the new styledVertexTypeAtom(type) / styledEdgeTypeAtom(type) atoms introduced in #1725.

Style changes already write to the same preference atoms, so only the read side needs to change.

Preferred Solution

• NodesStyling / EdgesStyling panels read { schema, preferences } from the new styled atoms
• Replace usage of displayVertexTypeConfigSelector / displayEdgeTypeConfigSelector in these panels
• The composed { schema, preferences } shape keeps schema and style data separate, improving referential stability

Related Issues

• Part of Support graphs with very large numbers of node types (70k+) #1677
• Depends on Push node background-color to Cytoscape ele.data() with styled type atoms #1725

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