UHI use case: Krakow dataset implementation

[wkravchyk]

What does this PR do?

Implementation of the Kraków UHI dataset (90 m GSD grid with no time-series data, just one acquisition date with most intensive UHI effect: 2024-08-29):

• added the script that generates model-ready Kraków dataset: src/data_preprocessing/make_model_ready_heat_krakow.py
• added the script that does spatial stratification of the Kraków dataset into train/val/test splits: src/data_preprocessing/heat_krakow_spatial_splits.py
• added HeatKrakowDataset class: src/data/heat_krakow_dataset.py
• added config files for Kraków dataset data, metrics and experiments
• added model-ready Kraków dataset .CSV file and .pth file: data/heat_krakow

All files were checked with pre-commit and passed all of the checks.

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[vdplasthijs]

Sorry for the delay @wkravchyk . All looks good, just wanted to double-check re the data. Either remove the csv from here (add it to your gitignore) and share it via Teams. Or if it's just a small file it's fine. What do you think is best?

[vdplasthijs]

We normally don't upload the data into the repo to keep the size down, except for the butterfly case so we have 1 working example. How large is the file?

[vdplasthijs]

(But all the data is on teams instead)