Add a 'set_ticks' PlotHelper function enabling setting tick locations and labels

This MR implements a slight wrapper around matplotlib's ax.set_*ticks and ax.set_*ticklabels functionality in the plot helper in form of a _hlpr_set_ticks function.

Details

The _hlpr_set_ticks function enables setting the tick locations and labels in a graph. It is necessary to specify the axis on which to set the ticks as well as whether the ticks are major or minor. The functionality best understood by looking at the helper_funcs.yml test configurations. Additionally, I added a use-case example of a configuration and its resulting graph below.

Use-case example

To see the functionality,

set_ticks:
  x:
    major:
      locs: [0,1,2,3,4,5,6,7]
      labels: 
        - None
        - Energy
        - Interaction prob
        - Investment
        - Payoff
        - Random
        - Strength
        - Goods
      rotation: vertical
  y:
    major: [0, 1, 2]
    minor: 
      locs: [0.5, 1.5]
      labels: 
        - Minor tick 0.5
        - Minor tick 1.5

relink_mode_remove.pdf

Anything to double-check?

• Should we raise an error if either of the major/minor is missing within an axis dict?
• In general, should we add more checks for parameter validity?
• Doc-string understandable?

Can this MR be accepted?

• Implementation ready
• Tests added or adjusted

• Code quality
  • Changes follow coding guidelines
  • Checked code coverage on new and adjusted code

• Ready for merging
  • Pipeline passes without warnings
  • History cleaned-up or squash option set
  • Changelog entry added
  • Version number bumped
  • Reviewed & approved by @

Related issues

#94