Examples/TSL: Add SubgroupFunctionNode with Compute Reduction Demonstration (#31378)

* init branch

* add example meta data

* remove logs, simplify comments, use more appropriate syntax (instancedArray instead of storage)

* new screenshot

* remove unused function

* add screenshot to puppeteer exceptions

* work

* add subgroup reduction example

* change native select approach

* revert nativeSelect error and permit intent of subgroup operation being stored in a var

* remove deprecated .label() calls

* cleanup

* work

* work

* fix rebase issues

* finish example 4

* add explanatory css animation for subgroup reduction

* remove references to nativeSelect, findLSB, and countTrailingZeros

* update screenshot

* remove unused style

* run lint

* fix tabs

* fix subgroup::before tab

* dummy commit to restart deepscan

* try tests again

Author: cmhhelgeson

examples/files.json

@@ -312,6 +312,7 @@
 		"webgpu_compute_particles_rain",
 		"webgpu_compute_particles_snow",
 		"webgpu_compute_points",
+		"webgpu_compute_reduce",
 		"webgpu_compute_sort_bitonic",
 		"webgpu_compute_texture",
 		"webgpu_compute_texture_3d",

examples/screenshots/webgpu_compute_reduce.jpg

@@ -125,6 +125,7 @@
 	"webgpu_compute_particles_rain": [ "gpgpu" ],
 	"webgpu_compute_particles_snow_external": [ "gpgpu" ],
 	"webgpu_compute_points": [ "gpgpu" ],
+	"webgpu_compute_reduce": [ "gpgpu" ],
 	"webgpu_compute_sort_bitonic": [ "gpgpu" ],
 	"webgpu_compute_texture": [ "gpgpu" ],
 	"webgpu_compute_texture_pingpong": [ "gpgpu" ],