Plotting percolator weights

[ArthurDeclercq]

Improvements 🚀

• Add single weights plot to plotting pdf
• Add feature set weights percentages to plotting pdf
• Added entry-point to create plots with MS²Rescore output

Bug fixes

• Fixed layout in count plot when using multiple FDR values
• Fixed loss gain plot

Refactoring and minor changes 🔧

• Added 0.1% FDR to default plotting output
• Enabled multiple feature sets to be plotted with plotting module CLI

[ArthurDeclercq]

@RalfG Do I add how to use the ms2rescore-plotting CLI to the readme?

[RalfG]

@RalfG Do I add how to use the ms2rescore-plotting CLI to the readme?

Yes, you can add this. Better document all public (CLI) APIs.

[ArthurDeclercq]

@RalfG the readme is updated