feat: add flags to mock command

[adrienaury]

--cacert <file>

Use the specified certificate file to verify the peer. The file may contain multiple CA certificates. The certificate(s) must be in PEM format.

-k, --insecure

By default, every secure connection is verified to be secure before the transfer takes place. This option skip the verification step and proceed without checking.

-x, --proxy [protocol://]host[:port]

Use the specified proxy to perform backend request.

-U, --proxy-user <user:password>

Specify the username and password to use for proxy authentication.

-u, --user <user:password>

Specify the username and password to use for server authentication.