feat: add acceptance tests for workflow manager (#19)

[kamleshyadav9929]

Description

Closes #19 - Write acceptance tests for the Workflow Manager addon.

Tests Added

Created comprehensive Cypress acceptance tests in cypress/tests/workflow-manager.cy.js:

1. Creating and Deleting Workflows

• Can navigate to Workflow Manager control panel
• Can create a new workflow
• Can delete an existing workflow

2. Workflow Actions

• Can add a new state
• Can add a new transition
• Sanity Check button works
• Assign button opens assign dialog

3. States and Transitions with Permissions

• Can update state permissions
• Can update transition permissions and groups
• Can delete a state
• Can delete a transition

4. Sanity Check Validation

• Validates workflow correctly
• View Results button appears on errors

5. Saving and Persistence

• Changes persist after saving
• State updates persist after save
• Transition updates persist after save

Graph Interactions (Bonus)

• Clicking node selects state
• Clicking edge selects transition
• Graph controls visible and functional

To Run Tests

pnpm run cypress:open
# or
pnpm run cypress:run