Krew plugin watching for drop events

**Is your feature request related to a problem? Please describe.**
Convert the drop debug script to live as a subcommand under ./cli/cmd
 
A script is being added here:
https://github.com/microsoft/retina/pull/1671

Optimal solution would to have this live in go format under something like `kubectl retina debug drop` etc.

Some requirements
- Before running invasive operations, like port-forward, confirm with user before acting
- Read/get operations don't require confirmation
- Maintain feature to write to file
- Dynamically print output to fit width of console window. If metric name word exceeds length of column, then word wrap within the column