Add configuration options for the for S-bit rate scan (comparator mode, threshold to be scanned, one channel scan)

Description

This MR aims at introducing the possibility to choose in the calibration interface the threshold type to scan during an S-bit scan. Also, the comparator mode should be selectable.

Related Issue

Fixes #215 (closed)

How Has This Been Tested?

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.