chore: checkpoint web Blender migration source, tools and docs

Accumulated uncommitted work: GHOST Web backend, WebGL/GPU web layer,
web workflow engine and protocol, tooling, docs and task records.
Large generated evidence, user-testing archives, build snapshots and
imported test assets remain untracked.

Co-Authored-By: Claude Code <noreply@anthropic.com>

blender-5.2.0/scripts/templates_py/gpu_compute_storage_web.py

@@ -0,0 +1,36 @@
+"""Web Blender: native GPU compute with a read/write storage buffer.
+
+Run from the Web Text Editor on a WebGPU-capable, isolated browser page.
+The kernel executes on the GPU. This template is a usage example, not an
+acceptance test and does not modify the current scene.
+"""
+
+import array
+import gpu
+
+# Group 0 binding indices match the order of `buffers`.
+source = """
+#version 450
+layout(local_size_x = 64, local_size_y = 1, local_size_z = 1) in;
+layout(set = 0, binding = 0, std430) buffer Values {
+  float data[];
+};
+void main() {
+  uint index = gl_GlobalInvocationID.x;
+  if (index < uint(data.length())) {
+    data[index] = 2.0 * data[index] + 1.0;
+  }
+}
+"""
+
+values = array.array("f", [0.0, 1.0, 2.0, 3.0])
+outputs = gpu.compute.dispatch_glsl(
+    source,
+    buffers=[values],
+    workgroups=(1, 1, 1),
+    binding_types=["storage"],
+    timeout_ms=30000,
+)
+result = array.array("f")
+result.frombytes(outputs[0])
+print("GPU storage-buffer output:", result.tolist())