Implementation of the threshold scan

Description

This is a draft implementation of the threshold scan.

Related Issue

How Has This Been Tested?

Tested code on the coffin setup. Data analysis was done with old unpacker/light-dqm code. in the file attached the channels vs thresholds are visible. It is also possible to spot dead/disconnected channels.

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.