feat: colored NDVI/NDWI/NDBI maps, remove SWIR/NBR, 7-output UI with legends

fix: use gr.Blocks(head=, js=) for Leaflet map — Gradio 5 strips script tags from gr.HTML values

fix: move css= from demo.launch() to gr.Blocks() (Gradio 5 API)

fix: remove unsupported 'buttons' param from gr.ImageSlider (Gradio 5)

fix: inline Leaflet CSS/JS into gr.HTML value (Gradio 5 has no 'head'/'js_on_load' params)

fix: use full semver for sdk_version (5.33.0)

Initial TerraVision ZeroGPU deployment

initial commit