scripts: zaru: Add instrumentation CLI tool

This commit adds 'zaru', a CLI tool for the instrumentation subsystem.

Signed-off-by: Gustavo Romero <[email protected]>
Signed-off-by: Kevin Townsend <[email protected]>
Signed-off-by: Erik Schilling <[email protected]>
Signed-off-by: Maciej Sobkowski <[email protected]>

Author: gromero