Enhance the analysis of depths

[FerriolCalvet]

• Compute depth per chromosome or chromosome arm
• Identify in which regions there is coverage outside the consensus panel.

[efigb]

add in QC plots based on depth:

• by pre-defined groups in features table
• by pre-defined group of genes

[efigb]

• Compute depth per chromosome or chromosome arm[ ] Identify in which regions there is coverage outside the consensus panel.

reopened issue since this task is still pending to add