Add landslide susceptibility layer

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As per the Indian Landslide Susceptibility Map 2023 (ILSM) generated by IIT-Delhi, over 75% of Goa has high or very high landslide risk.

It will be useful to see this layer in context of the slope layer

• Explorer: https://hydrosense.users.earthengine.app/view/ilsm
• Data: https://zenodo.org/records/10085272
• License: CC-by 4.0 Sharma, N. K., Saharia, M., & Ramana, G. (2023). India Landslide Susceptibility Map ILSM (100m resolution) [Data set]. Zenodo. https://doi.org/10.5281/zenodo.10085272

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