TSL: Improve fog approach. (#1443)

* TSL: Improve fog approach.

* Update three.js

* FogNode?

* Fix

* Add src

* Update patch and delete src

* Update declarations

* Add examples

* Update patch and delete examples

examples-testing/changes.patch

@@ -13442,13 +13442,13 @@ index 3331adc8..17d73367 100644
 
      object.position.y = 0.8;
 diff --git a/examples-testing/examples/webgpu_custom_fog_background.ts b/examples-testing/examples/webgpu_custom_fog_background.ts
-index 4a2e6c80..22eeb6d0 100644
+index baca16cb..b01cd750 100644
 --- a/examples-testing/examples/webgpu_custom_fog_background.ts
 +++ b/examples-testing/examples/webgpu_custom_fog_background.ts
 @@ -1,4 +1,4 @@
 -import * as THREE from 'three';
 +import * as THREE from 'three/webgpu';
- import { pass, color, rangeFog } from 'three/tsl';
+ import { pass, color, rangeFogFactor } from 'three/tsl';
 
  import { RGBELoader } from 'three/addons/loaders/RGBELoader.js';
 @@ -6,8 +6,8 @@ import { RGBELoader } from 'three/addons/loaders/RGBELoader.js';