Krew plugin watching for drop events

[matmerr]

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:
#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