Update the "cannot attach" message on macOS with more info

[thestr4ng3r]

rizin/librz/io/p/io_mach.c

Lines 399 to 403 in 1b688fa

	perror("ptrace: Cannot attach");
	eprintf("\n\nPlease ensure your rizin binary is signed and it has the right entitlements to make debugger work. ");
	eprintf("Be aware that binaries signed by Apple cannot be debugged due to the Apple System Integrity Protection (SIP).\n");
	eprintf("\nFor more info look at: https://book.rizin.re/debugger/apple.html#sign-rizin-binary\n\n");
	eprintf("ERRNO: %d (EINVAL)\n", errno);

Another possible cause is that in non-interactive sessions like ssh, the system.privilege.taskport authorization cannot be granted by default. Might be good to change this message into a list of things that could be the cause.