Refactor data.py

[peterdudfield]

Detailed Description

Current the pvnet_app/data.py has a lot of functions. It might be good to split this up

We current have

• download_all_sat_data
• _get_latest_time_and_mins_delay
• combine_5_and_15_sat_data
• extend_satellite_data_with_nans
• check_model_inputs_available
• preprocess_sat_data
• _download_nwp_data
• download_all_nwp_data
• regrid_nwp_data
• fix_ecmwf_data
• fix_ukv_data
• preprocess_nwp_data

Context

good to keep things clean Might be good to wait for #108

Possible Implementation

We could split this into pvnet_app/data/satellite.py and pvnet_app/data/nwp.py file.

Similiar for the tests

[DivyamAgg24]

Hi, I hope this finds you well. I have created a branch named refactor-data.py and made the changes mentioned in this issue. The changes include creating a data folder and within in satellite.py and nwp.py with appropriate functions from data.py. The changes to imports in test_data.py have also been made

[peterdudfield]

Amazing @DivyamAgg24 - could you make a PR to this repo?

[DivyamAgg24]

I have created a pull request to this Repo

[peterdudfield]

Thank you @DivyamAgg24 for this