Update verify logic in authority module update authority command

[mitsuaki-u]

Expected behavior

Verify hook in update authority command should have proper schema and checks

Actual behavior

• Validator length check can be done in schema.
• totalWeight === 0 check missing
• Validator weight cannot be 0

Steps to reproduce

Check verify hook logic

Which version(s) does this affect? (Environment, OS, etc...)

v6.0.0