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

resources/kindred-create.desktop

@@ -0,0 +1,13 @@
+[Desktop Entry]
+Name=Kindred Create
+GenericName=CAD Application
+Comment=Parametric 3D CAD modeler based on FreeCAD
+Exec=kindred-create %U
+Icon=kindred-create
+Terminal=false
+Type=Application
+Categories=Graphics;Science;Engineering;
+MimeType=application/x-extension-fcstd;x-scheme-handler/kindred;
+Keywords=CAD;3D;modeling;engineering;design;parametric;
+StartupNotify=true
+StartupWMClass=KindredCreate

resources/kindred-create.xml

@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<mime-info xmlns="http://www.freedesktop.org/standards/shared-mime-info">
+  <mime-type type="application/x-extension-fcstd">
+    <comment>Kindred Create Document</comment>
+    <comment xml:lang="en">Kindred Create Document</comment>
+    <icon name="kindred-create"/>
+    <glob pattern="*.FCStd"/>
+    <glob pattern="*.fcstd"/>
+    <glob pattern="*.FCSTD"/>
+  </mime-type>
+</mime-info>