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/ARCHITECTURE.md

@@ -0,0 +1,72 @@
+# Architecture
+
+## Bootstrap flow
+
+```
+FreeCAD startup
+  └─ src/Mod/Create/Init.py
+       └─ setup_kindred_addons()
+            ├─ exec(mods/ztools/ztools/Init.py)
+            └─ exec(mods/silo/freecad/Init.py)
+
+  └─ src/Mod/Create/InitGui.py
+       ├─ setup_kindred_workbenches()
+       │    ├─ exec(mods/ztools/ztools/InitGui.py)
+       │    │    └─ schedules deferred _register() (2000ms)
+       │    │         ├─ imports ZTools commands
+       │    │         ├─ installs _ZToolsManipulator (global)
+       │    │         └─ injects commands into editing contexts
+       │    └─ exec(mods/silo/freecad/InitGui.py)
+       │         ├─ registers SiloWorkbench
+       │         └─ schedules deferred Silo overlay registration (2500ms)
+       ├─ EditingContextResolver singleton created (MainWindow constructor)
+       │    ├─ registers built-in contexts (PartDesign, Sketcher, Assembly, Spreadsheet)
+       │    ├─ connects to signalInEdit/signalResetEdit/signalActiveDocument/signalActivateView
+       │    └─ BreadcrumbToolBar connected to contextChanged signal
+       └─ Deferred setup (QTimer):
+            ├─ 1500ms: _register_silo_origin()      → registers Silo FileOrigin
+            ├─ 2000ms: _setup_silo_auth_panel()     → "Database Auth" dock
+            ├─ 2000ms: ZTools _register()            → commands + manipulator
+            ├─ 2500ms: Silo overlay registration     → "Silo Origin" toolbar overlay
+            ├─ 3000ms: _check_silo_first_start()    → settings prompt
+            ├─ 4000ms: _setup_silo_activity_panel() → "Database Activity" dock (SSE)
+            └─ 10000ms: _check_for_updates()        → update checker (Gitea API)
+```
+
+## Key source layout
+
+```
+src/Mod/Create/              Kindred bootstrap module (Python)
+  ├── Init.py                Adds mods/ addon paths, loads Init.py files
+  ├── InitGui.py             Loads workbenches, installs Silo manipulators
+  ├── version.py.in          CMake template → version.py (build-time)
+  └── update_checker.py      Checks Gitea releases API for updates
+
+src/Gui/EditingContext.h/.cpp        EditingContextResolver singleton + context registry
+src/Gui/BreadcrumbToolBar.h/.cpp     Color-coded breadcrumb toolbar (Catppuccin Mocha)
+src/Gui/FileOrigin.h/.cpp           FileOrigin base class + LocalFileOrigin
+src/Gui/CommandOrigin.cpp            Origin_Commit/Pull/Push/Info/BOM commands
+src/Gui/OriginManager.h/.cpp        Origin lifecycle management
+src/Gui/OriginSelectorWidget.h/.cpp  UI for origin selection
+
+mods/ztools/                 [submodule] command provider (not a workbench)
+  ├── ztools/InitGui.py      Deferred command registration + _ZToolsManipulator
+  ├── ztools/ztools/
+  │   ├── commands/          Datum, pattern, pocket, assembly, spreadsheet
+  │   ├── datums/core.py     Datum creation via Part::AttachExtension
+  │   └── resources/         Icons, theme utilities
+  └── CatppuccinMocha/       Theme preference pack (QSS)
+
+mods/silo/                   [submodule -> silo-mod.git] FreeCAD workbench
+  ├── silo-client/           [submodule -> silo-client.git] shared API client
+  │   └── silo_client/       SiloClient, SiloSettings, CATEGORY_NAMES
+  └── freecad/               FreeCAD workbench (Python)
+      ├── InitGui.py         SiloWorkbench + Silo overlay context registration
+      ├── silo_commands.py   Commands + FreeCADSiloSettings adapter
+      └── silo_origin.py     FileOrigin backend for Silo
+
+src/Gui/Stylesheets/         QSS themes and SVG assets
+src/Gui/PreferencePacks/     KindredCreate preference pack (cfg + build-time QSS)
+```
+
+See [INTEGRATION_PLAN.md](INTEGRATION_PLAN.md) for architecture layers and phase status.