Moves node actions to menu bar Node menu

[Mbeaulne]

Description

Adds a Node menu to the editor menu bar that consolidates node-level actions (duplicate, delete, arrange/z-index, and unpack subgraph) into a single dropdown. This menu is context-sensitive and only appears when a node is selected.

As part of this change, the inline TaskActionsBar (with its individual DeleteTaskButton, DuplicateTaskButton, and UnpackSubgraphButton components) and the StackingControls/ZIndexEditor controls from the task and IO node detail panels have been removed. Their functionality is now accessible exclusively through the new NodeMenu in the menu bar.

The EditorMenuBar has also been moved inside the ReactFlowProvider so the NodeMenu can access the React Flow instance (e.g., getNodes) needed to compute z-index ordering.

Related Issue and Pull requests

Type of Change

• Bug fix
• New feature
• Improvement
• Cleanup/Refactor
• Breaking change
• Documentation update

Checklist

• I have tested this does not break current pipelines / runs functionality
• I have tested the changes on staging

Screenshots (if applicable)

Test Instructions

1. Open the editor and select a task node.
2. Confirm the Node menu appears in the menu bar.
3. Verify Duplicate Task, Delete Task, and Arrange (Move Forward, Move Backward, Bring to Front, Send to Back) all work correctly.
4. For a subgraph task, confirm the Unpack Subgraph option appears and functions correctly.
5. Select an input or output node and confirm the Node menu appears with only the Arrange submenu (no duplicate/delete options).
6. Deselect all nodes and confirm the Node menu is no longer visible.

Additional Comments

The ZIndexEditor and StackingControls components may now be unused elsewhere and can be considered for removal in a follow-up cleanup.

[github-actions]

🎩 Preview

A preview build has been created at: 04-23-move_actions_to_menu/b8d8d70

[Mbeaulne]

• feat: v2 - pipeline details facelift #2187
• feat: v2 - task details context panel facelift #2186
• Adds inline rename for pipelines and tasks #2150
• Moves node actions to menu bar Node menu #2149 👈 (View in Graphite)
• Improves task node color palette derivation and picker UX #2148
• Replaces task details tabs with collapsible sections #2147
• Removes task details tab #2146
• master

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[camielvs]

I'm not sure I like this change. I can see merit for moving the arrange/Z-Index tools but not sure about the rest.
Maybe it would be better to always have the "Nodes" menu available, but disabled if a node isn't selected? Then we can contextualize it to other nodes as well (input, output, flex) and users at least know the menu exists before clicking a node and trying to find it.

Interested in @maxy-shpfy's thoughts

[camielvs]

I don't want to block - we can iterate.

Though I will make one suggestion: add "rename task" to the menu as well?

Also IO nodes don't have a delete option