feat(layout-directed-graph): add disableOptimalOrderHeuristic and customOrder options

[kumilingus]

Expose dagre options disableOptimalOrderHeuristic and customOrder through the DirectedGraph.layout() function.

[Copilot]

Pull Request Overview

This PR introduces two new layout options—disableOptimalOrderHeuristic and customOrder—to the directed graph layout engine.

• Adds a new test for the customOrder callback
• Integrates the new options into the layout configuration within DirectedGraph.mjs

Reviewed Changes

Copilot reviewed 4 out of 5 changed files in this pull request and generated no comments.

File	Description
packages/joint-layout-directed-graph/test/index.js	Added a QUnit test to validate the customOrder option functionality
packages/joint-layout-directed-graph/DirectedGraph.mjs	Incorporated disableOptimalOrderHeuristic and customOrder options into the layout process

Files not reviewed (1)

• packages/joint-layout-directed-graph/package.json: Language not supported

Comments suppressed due to low confidence (1)

packages/joint-layout-directed-graph/DirectedGraph.mjs:185

• Consider adding a dedicated test case to verify the behavior of the disableOptimalOrderHeuristic option and ensure it influences layout as expected.

disableOptimalOrderHeuristic: !!opt.disableOptimalOrderHeuristic,