Remove options --response-wait, --response-timeout

Remove options and rework input handling so it is possible to do the
same thing but via script which is much more flexible.

These options were always a bit of a hardcoded solution. With the new
script expect feature we can wait for any type of response.

For example, pipe command to serial device and wait for line response within 1 second:

$ echo "*IDN?" | tio /dev/ttyACM0 --script "expect('\r\n', 1000)" --mute

src/options.h

@@ -77,8 +77,6 @@ struct option_t
     unsigned char prefix_code;
     unsigned char prefix_key;
     bool prefix_enabled;
-    bool response_wait;
-    int response_timeout;
     bool mute;
     bool rs485;
     uint32_t rs485_config_flags;