Log level flags are not validated

[mjkim610]

Proxify version:

0.0.7

Current Behavior:

When both -silent and -v flags are set, most logs are turned off but resp body is printed.

Expected Behavior:

When both -silent and -v flags are set, proxify returns an error or exception.

Steps To Reproduce:

1. Run proxify -v -silent

Anything else:

Related discussion: https://github.com/projectdiscovery/proxify/discussions/145