[FEAT] create python decorator for get approval

[edwinkys]

Feature Description

We want to add a Python decorator abstracting the core functionality of get approval method:

• @phantasm.require_approval()
• @phantasm.require_approval_with_parameters()

Potential Solution

require_approval() should only care if the function is approved or not.
require_approval_with_parameters() should support inserting parameters from the approvers.

Additional Context

I want the usage to be similar with this from HumanLayer