Persist user layout preferences in Workflow Studio (panels resizing/collapsing)

## Feature Request

### Problem Overview
Currently in Workflow Studio, users can resize or collapse/expand panels such as:
Left menu (Activities, Workflows, etc.)
Workflow canvas area
Right-hand Properties/Variables panel

However, these layout changes are not persisted. After refreshing or reopening the editor, the layout resets to its default state. This requires the user to reapply their preferred layout every time, which is time-consuming and impacts usability.

### Proposed Solution
Persist user layout preferences (panel sizes, collapsed/expanded states) so that they are restored automatically the next time Workflow Studio is opened.

### Alternative Solutions
Currently, the only workaround is for the user to manually resize or collapse/expand panels every time they open Workflow Studio. No effective permanent workaround exists.

### Use Cases
Developers who prefer a minimal view with only the canvas and no side panels.
Users who want the Properties panel always expanded for quick editing.
Teams working on large workflows that require maximizing the canvas area.