feat: plan render for parallel aware case

Description

Add rendering of plans with parallel execution.

• the MR description has been reviewed
• this MR contains text changes and they have been reviewed OR there are no texts changes
• this MR contains GUI/CLI changes and they have been reviewed OR there are no GUI/CLI changes
• this MR contains API changes and they have been reviewed OR there are no API changes

Related issue

Closes #59 (closed).

Examples

Test for the case have been added.