phase 1: copy Kindred-only files onto upstream/main (FreeCAD 1.2.0-dev)

Wholesale copy of all Kindred Create additions that don't conflict with
upstream FreeCAD code:

- kindred-icons/ (1444 Catppuccin Mocha SVG icon overrides)
- src/Mod/Create/ (Kindred Create workbench)
- src/Gui/ Kindred source files (FileOrigin, OriginManager,
  OriginSelectorWidget, CommandOrigin, BreadcrumbToolBar, EditingContext)
- src/Gui/Icons/ (Kindred branding and silo icons)
- src/Gui/PreferencePacks/KindredCreate/
- src/Gui/Stylesheets/ (KindredCreate.qss, images_dark-light/)
- package/ (rattler-build recipe)
- docs/ (architecture, guides, specifications)
- .gitea/ (CI workflows, issue templates)
- mods/silo, mods/ztools submodules
- .gitmodules (Kindred submodule URLs)
- resources/ (kindred-create.desktop, kindred-create.xml)
- banner-logo-light.png, CONTRIBUTING.md

docs/src/guide/workbenches.md

@@ -0,0 +1,23 @@
+# Workbenches
+
+Kindred Create ships two custom workbenches on top of FreeCAD's standard set.
+
+## ztools
+
+A unified workbench that consolidates part design, assembly, and sketcher tools into a single interface. It is the **default workbench** when Kindred Create launches.
+
+ztools commands are also injected into the PartDesign workbench menus and toolbars via a manipulator mechanism, so they are accessible even when working in stock PartDesign.
+
+See the [ztools guide](./ztools.md) for details.
+
+## Silo
+
+A parts database workbench for managing CAD files, part numbers, revisions, and bills of materials across teams. Silo commands (New, Open, Save, Commit, Pull, Push, Info, BOM) are integrated into the File menu and toolbar across **all** workbenches via the origin system.
+
+Silo requires a running server instance. On first launch, Kindred Create prompts for server configuration.
+
+See the [Silo guide](./silo.md) for details.
+
+## Stock FreeCAD workbenches
+
+All standard FreeCAD workbenches are available: PartDesign, Sketcher, Assembly, TechDraw, Draft, BIM, CAM, FEM, Mesh, Spreadsheet, and others. Kindred Create does not remove or disable any stock functionality.