Enhanced the Software with Semi-Integration

[Muhammad-Rebaal]

Hi @cwhanse !

Hope you are doing well !

I've open a PR for the enhancement asked in the issue #2330 for semi_integration model for roof top mounted systems and also write the test for it . So, Could you please take a look at it & let me if anything needs to change ?

Thank You !

[cwhanse]

Hi @Muhammad-Rebaal there's a lot that needs to be done differently here.

1. The parameters for the semi-integrated case need to be added to the dict here
2. The docstring of temperature.pvsyst_cell needs to have the semi-integrated case added.
3. The docstring and methods of pvsystem/PVSystem need to have semi-integrated added as an option for racking_model. You can locate where by searching for one of the existing parameter names for the PVsyst temperature model, e.g. freestanding
4. The unit test should only test that the correct parameters are inferred when racking_model is semi-integrated. That test goes here. The correct calculation by the pvsyst_cell function is already tested.

[Muhammad-Rebaal]

Hi @Muhammad-Rebaal there's a lot that needs to be done differently here.

1. The parameters for the semi-integrated case need to be added to the dict here
2. The docstring of temperature.pvsyst_cell needs to have the semi-integrated case added.
3. The docstring and methods of pvsystem/PVSystem need to have semi-integrated added as an option for racking_model. You can locate where by searching for one of the existing parameter names for the PVsyst temperature model, e.g. freestanding
4. The unit test should only test that the correct parameters are inferred when racking_model is semi-integrated. That test goes here. The correct calculation by the pvsyst_cell function is already tested.

Oh my bad ! Actually, I changed those stuff but it wasn't pushed by me 😬
Thank you for your assistance @cwhanse