Add SDP CLI sample

[RodrigoHolztrattner-QuIC]

This sample uses the CLI application to fetch device counters through the realtime metrics mode. It uses ImGui to create an UI where one can visualize the fetched data with graphs over long periods of time.

Some implementation details of this sample:

• Drag and drop a graph into another to merge
• Right click a graph entry on the legend to unmerge
• Device selection is available through a drop-down widget
• Sampling period can be adjusted
• Each graph can be viewed as a histogram if not in a group