Add tests for image layer, image plane, inventory, saved layout, commands, documentation, manifest, and packaging

- Implement tests for image layer functionality including alpha curve and depth layer behavior.
- Create tests for image plane evaluation and modifier input handling.
- Add tests to verify the saved asset inventory and its persistence.
- Introduce tests for the documentation command to ensure correct project version deployment.
- Validate the extension manifest structure and required permissions.
- Develop tests for the packaging process, ensuring correct platform handling and dependency management.
- Enhance image depth plane group functionality with new split threshold input and surface processing.

tests/tools/nodes/test_inventory.py

@@ -0,0 +1,23 @@
+"""Check the saved library's public inventory and persistence."""
+import bpy
+from anyimage.common.node import load_node_group, node_asset_path
+from tools.nodes.check import GEOMETRY_NAMES, SHADER_NAMES
+
+
+def test_saved_asset_inventory():
+    bpy.ops.wm.read_factory_settings(use_empty=True)
+    with bpy.data.libraries.load(str(node_asset_path())) as (source, _):
+        assert set(source.node_groups) == GEOMETRY_NAMES | SHADER_NAMES
+    for name in sorted(GEOMETRY_NAMES | SHADER_NAMES):
+        bpy.ops.wm.read_factory_settings(use_empty=True)
+        node_group = load_node_group(name)
+        assert node_group.bl_idname == ("GeometryNodeTree" if name in GEOMETRY_NAMES else "ShaderNodeTree")
+        assert node_group.use_fake_user and node_group.users > 0
+        if name in GEOMETRY_NAMES:
+            assert node_group.is_modifier
+        if bpy.app.version >= (5, 0, 0):
+            assert node_group.library is not None
+        if name in {"O Image Depth Layer", "O Shadeless"}:
+            expected = ["Color", "Alpha", "Depth", "Bump Scale"] if name == "O Image Depth Layer" else ["Color"]
+            assert [item.name for item in node_group.interface.items_tree
+                    if item.item_type == "SOCKET" and item.in_out == "INPUT"] == expected