chore(silo): add root package.xml and migrate setup to silo addon (#373)

Update silo submodule to include root-level package.xml, Init.py, and
InitGui.py following the standard addon layout used by sdk, gears,
datums, and solver.

Move five Silo-specific deferred setup functions from
src/Mod/Create/InitGui.py into the silo addon's own InitGui.py:
- Document observer registration (600ms)
- Auth dock panel via kindred_sdk.register_dock_panel() (2000ms)
- First-start settings check (3000ms)
- Activity dock panel via kindred_sdk.register_dock_panel() (4000ms)
- Remove duplicate origin registration (was 1500ms, already done in
  SiloWorkbench.Initialize())

Update CMake install targets to include root-level silo files.

Create core InitGui.py now only handles kc_format (500ms) and
update_checker (10000ms).

src/Mod/Create/CMakeLists.txt

@@ -42,6 +42,14 @@ install(
 )
 
 # Install Silo addon
+install(
+    FILES
+        ${CMAKE_SOURCE_DIR}/mods/silo/package.xml
+        ${CMAKE_SOURCE_DIR}/mods/silo/Init.py
+        ${CMAKE_SOURCE_DIR}/mods/silo/InitGui.py
+    DESTINATION
+        mods/silo
+)
 install(
     DIRECTORY
         ${CMAKE_SOURCE_DIR}/mods/silo/freecad/

src/Mod/Create/InitGui.py

@@ -2,7 +2,6 @@
 # GUI initialization - loads Kindred addon workbenches via manifest-driven loader
 
 import FreeCAD
-import FreeCADGui
 
 try:
     from addon_loader import load_addons
@@ -24,99 +23,6 @@ def _register_kc_format():
         FreeCAD.Console.PrintLog(f"Create: kc_format registration skipped: {e}\n")
 
 
-def _register_silo_document_observer():
-    """Register the Silo document observer for .kc tree building."""
-    try:
-        import silo_document
-
-        silo_document.register()
-    except Exception as e:
-        FreeCAD.Console.PrintLog(f"Create: silo_document registration skipped: {e}\n")
-
-
-# ---------------------------------------------------------------------------
-# Silo integration enhancements
-# ---------------------------------------------------------------------------
-
-
-def _check_silo_first_start():
-    """Show Silo settings dialog on first startup if not yet configured."""
-    try:
-        param = FreeCAD.ParamGet("User parameter:BaseApp/Preferences/Mod/KindredSilo")
-        if not param.GetBool("FirstStartChecked", False):
-            param.SetBool("FirstStartChecked", True)
-            if not param.GetString("ApiUrl", ""):
-                FreeCADGui.runCommand("Silo_Settings")
-    except Exception as e:
-        FreeCAD.Console.PrintLog(f"Create: Silo first-start check skipped: {e}\n")
-
-
-def _register_silo_origin():
-    """Register Silo as a file origin so the origin selector can offer it."""
-    try:
-        import silo_commands  # noqa: F401 - registers Silo commands
-        import silo_origin
-
-        silo_origin.register_silo_origin()
-    except Exception as e:
-        FreeCAD.Console.PrintLog(f"Create: Silo origin registration skipped: {e}\n")
-
-
-def _setup_silo_auth_panel():
-    """Dock the Silo authentication panel in the right-hand side panel."""
-    try:
-        from kindred_sdk import register_dock_panel
-
-        def _factory():
-            import silo_commands
-
-            auth = silo_commands.SiloAuthDockWidget()
-            # Prevent GC of the auth timer by stashing on the widget
-            auth.widget._auth = auth
-            return auth.widget
-
-        register_dock_panel("SiloDatabaseAuth", "Database Auth", _factory)
-    except Exception as e:
-        FreeCAD.Console.PrintLog(f"Create: Silo auth panel skipped: {e}\n")
-
-
-def _setup_silo_activity_panel():
-    """Show a dock widget with recent Silo database activity."""
-    try:
-        from kindred_sdk import register_dock_panel
-
-        def _factory():
-            from PySide import QtWidgets
-
-            widget = QtWidgets.QWidget()
-            layout = QtWidgets.QVBoxLayout(widget)
-            activity_list = QtWidgets.QListWidget()
-            layout.addWidget(activity_list)
-
-            try:
-                import silo_commands
-
-                items = silo_commands._client.list_items()
-                if isinstance(items, list):
-                    for item in items[:20]:
-                        pn = item.get("part_number", "")
-                        desc = item.get("description", "")
-                        updated = item.get("updated_at", "")
-                        if updated:
-                            updated = updated[:10]
-                        activity_list.addItem(f"{pn} - {desc} - {updated}")
-                if activity_list.count() == 0:
-                    activity_list.addItem("(No items in database)")
-            except Exception:
-                activity_list.addItem("(Unable to connect to Silo database)")
-
-            return widget
-
-        register_dock_panel("SiloDatabaseActivity", "Database Activity", _factory)
-    except Exception as e:
-        FreeCAD.Console.PrintLog(f"Create: Silo activity panel skipped: {e}\n")
-
-
 def _check_for_updates():
     """Check for application updates in the background."""
     try:
@@ -132,11 +38,6 @@ try:
     from PySide.QtCore import QTimer
 
     QTimer.singleShot(500, _register_kc_format)
-    QTimer.singleShot(600, _register_silo_document_observer)
-    QTimer.singleShot(1500, _register_silo_origin)
-    QTimer.singleShot(2000, _setup_silo_auth_panel)
-    QTimer.singleShot(3000, _check_silo_first_start)
-    QTimer.singleShot(4000, _setup_silo_activity_panel)
     QTimer.singleShot(10000, _check_for_updates)
 except Exception:
     pass