Examples: Add UltraHDRLoader (#28825)

* Add UltraHDRLoader

* Add UltraHDRLoader example
Adjust files.json
Add 2K hdr.jpg texture

* Change URL validation to equivalent hdrgm:Version param validation

* Add docs screenshot

* Adjust for DeepScan

* Add THREE.FloatType support

* Return pending DataTexture directly from .load

* Deprecate hdrjpg example

* Adjust code to precalculate values where feasible
Adjust for DeepScan

examples/files.json

@@ -118,8 +118,8 @@
 		"webgl_loader_tilt",
 		"webgl_loader_texture_dds",
 		"webgl_loader_texture_exr",
+		"webgl_loader_texture_ultrahdr",
 		"webgl_loader_texture_hdr",
-		"webgl_loader_texture_hdrjpg",
 		"webgl_loader_texture_ktx",
 		"webgl_loader_texture_ktx2",
 		"webgl_loader_texture_logluv",

examples/jsm/Addons.js

@@ -117,6 +117,7 @@ export * from './loaders/PDBLoader.js';
 export * from './loaders/PLYLoader.js';
 export * from './loaders/PVRLoader.js';
 export * from './loaders/RGBELoader.js';
+export * from './loaders/UltraHDRLoader.js';
 export * from './loaders/RGBMLoader.js';
 export * from './loaders/STLLoader.js';
 export * from './loaders/SVGLoader.js';