Refactor and enhance SnapForm functionality

- Introduced MODEL_NUMBERS for better model indexing.
- Improved enum_items function to cache results and handle download status.
- Updated ActiveJob class to manage temporary input paths and added displacement_via property.
- Changed IMAGE_DEPTH_PROCESS_RES_METHOD from "lower_bound_resize" to "upper_bound_resize".
- Enhanced RunJob operator to include new properties and improved error messages.
- Modified panel layout for better user experience and added runtime installation checks.
- Updated SnapFormSettings to reflect new model properties and defaults.
- Added temporary input path management in runtime.
- Refined worker functions to improve error handling and messaging.
- Expanded tests to cover new functionality and ensure backward compatibility.
- Fixed packaging script to align with versioning conventions.

src/snapform/properties.py

@@ -1,6 +1,6 @@
 import bpy
 
-from .models import enum_items
+from .models import gs_model_enum_items, model_enum_items
 
 
 class SnapFormSettings(bpy.types.PropertyGroup):
@@ -19,14 +19,12 @@ class SnapFormSettings(bpy.types.PropertyGroup):
     model: bpy.props.EnumProperty(
         name="Model",
         description="Depth Anything 3 model",
-        items=enum_items(),
-        default="BASE",
+        items=model_enum_items,
     )
     gs_model: bpy.props.EnumProperty(
         name="Model",
         description="Depth Anything 3 model with a Gaussian head",
-        items=enum_items(supports_gs=True),
-        default="GIANT_1_1",
+        items=gs_model_enum_items,
     )
     device: bpy.props.EnumProperty(
         name="Device",
@@ -60,7 +58,7 @@ class SnapFormSettings(bpy.types.PropertyGroup):
                 "Make Process Res the shorter side",
             ),
         ),
-        default="lower_bound_resize",
+        default="upper_bound_resize",
     )
     conf_thresh_percentile: bpy.props.FloatProperty(
         name="Conf Thresh Percentile",