Add easy plotting method for horizontal bar plots

[pb866]

Description

Add plotting functions for a standard layout of horizontal bar plots. The plots should still be adjustable, if desired.

Definition of Done

• [x] All ACs fulfilled
• [x] Feature tested
• [x] Related feature branch(es) merged and deleted
• [x] Documentation updated

Acceptance Criteria

• [x] easy plotting function for horizontal bar plots added with few intuitive args/kwargs
• [x] plots can still be adjusted or directly saved to a file

[pb866]

Blocked by #6 and #7.

[pb866]

Closed by 96e18ef5c84ea69cd4a5e8301336e0bf20c93565.