GLSP-Playwright Tests for already existing features

[haydar-metin]

This issue provides an overview of the E2E tests for the already existing features and their state (e.g., WIP). Please do not add new features here, create a separate issue in the future. This issue only serves as an overview to know the progress.

Feature	PR	State
Model Saving
Model Dirty State
Model SVG Export
Model Layout
Restoring viewport on re-open
Model Edit Modes - Edit - Read-only
Client View Port - Center - Fit to Screen
Client Status Notification
Client Message Notification
Client Progress Reporting
Element Selection	eclipse-glsp/glsp-playwright#7	Finished
Element Hover	eclipse-glsp/glsp-playwright#9	Finished
Element Validation	eclipse-glsp/glsp-playwright#15	Finished
Element Navigation	eclipse-glsp/glsp-playwright#15	Finished
Element Type Hints	eclipse-glsp/glsp-playwright#23	Finished
Element Creation and Deletion	eclipse-glsp/glsp-playwright#23	Finished
Node Change Bounds - Move - Resize	eclipse-glsp/glsp-playwright#23	Finished
Node Change Container		Not possible in workflow example
Edge Reconnect	eclipse-glsp/glsp-playwright#23	Finished
Edge Routing Points	eclipse-glsp/glsp-playwright#23	Finished
Ghost Elements
Element Text Editing	eclipse-glsp/glsp-playwright#23	Finished
Clipboard (Cut, Copy, Paste)
Undo / Redo	eclipse-glsp/glsp-playwright#23	Finished
Contexts - Context Menu - Command Palette - Tool Palette
Accessibility Features (experimental) - Search - Move - Zoom - Resize
Helper Lines (experimental)

Reference: #1154

[haydar-metin]

Fix: Avoid showing a warning if only a single integration is executed and the other environment variables are not present in the .env file.

Currently, the issue is that the code displays a warning even when the environment variables are unnecessary because only one integration is being executed, which doesn't require those variables.

Integrations:

• Theia GLSP-1287: Add CI job for E2E tests glsp-theia-integration#229
• Client GLSP-1287: Add CI job for E2E tests glsp-client#381
• VSCode