pipsolar: implement command QPGS0

**Describe the problem you have/What new integration you would like**
pipsoloar component reads just 1st MPPT for inverters having 2 MPPT

**Please describe your use case for this integration and alternatives you've tried:**
I have a Voltronic Axpert MAX 7.2kW inverter with 2 PV input (2 independent MPPT).
Accordly to protocol version 30 for MAX inverters (see https://github.com/jblance/mpp-solar/blob/master/docs/protocols/PI30MAX.Communication.Protocol20210217.pdf), QPIGS reads just 1st MPPT.
Using QPGS0, return both MPPT data.

Trying mpp-solar:

```
mpp-solar --port /dev/hidraw2 --protocol PI30MAX --command QPGS0
Command: QPGS0 - Parallel Information inquiry
------------------------------------------------------------
Parameter Value Unit
parallel_instance_number Not valid
serial_number 92932210103877
work_mode Standby Mode
fault_code No fault
grid_voltage 213.4 V
grid_frequency 49.98 Hz
ac_output_voltage 0.0 V
ac_output_frequency 0.0 Hz
ac_output_apparent_power 0 VA
ac_output_active_power 0 W
load_percentage 0 %
battery_voltage 1.1 V
battery_charging_current 0 A
battery_capacity 0 %
pv1_input_voltage 0.0 V
total_charging_current 0 A
total_ac_output_apparent_power 0 VA
total_output_active_power 0 W
total_ac_output_percentage 0 %
is_scc_ok 0 bool
is_ac_charging 0 bool
is_scc_charging 0 bool
is_battery_over_voltage 0 bool
is_battery_under_voltage 2 bool
is_line_lost 0 bool
is_load_on 0 bool
is_configuration_changed 0 bool
output_mode single machine
charger_source_priority Solar only
max_charger_current 60 A
max_charger_range 120 A
max_ac_charger_current 2 A
pv1_input_current 0 A
battery_discharge_current 0 A
pv2_input_voltage 0.0 V
pv2_input_current 0 A
```

**Additional context**

Start by locating the pipsolar component's command handling and compare its existing QPIGS path with the QPGS0 response shown. Use the linked PI30MAX protocol document and sample output to determine the response fields, then confirm that both pv1 and pv2 voltage and current values are exposed.

Written by the indexing model from the issue text.