Remove old workflow types

[wintonzheng]

[!IMPORTANT] Refactor workflow-related types by moving them from types.ts to workflowTypes.ts and update imports accordingly.

• Refactoring:
  • Remove WorkflowParameterValueType, WorkflowParameterType, WorkflowParameter, WorkflowBlock, and WorkflowApiResponse from types.ts.
  • Move WorkflowParameter, WorkflowBlock, and WorkflowApiResponse to workflowTypes.ts.
• Imports:
  • Update imports in CreateNewTaskFormPage.tsx, SavedTasks.tsx, WorkflowPage.tsx, WorkflowParameterInput.tsx, WorkflowTitle.tsx, and WorkflowsTable.tsx to use workflowTypes.ts for workflow-related types.

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