feat(org-chart): add core cards and fixed-layout integration

packages/org-chart/src/assets/workdesk/README.md

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+# Workdesk Full Composition artwork
+
+These nine files are copied byte-for-byte from the read-only source
+`D:\디자인시스템\gpd-workdesk\sample\조직도_v1.3\public`.
+They are embedded by `?inline` imports in the shared Core ESM/IIFE bundles, so
+HTML and React need no external Workdesk server or asset URL.
+
+The compact `screenD` hub paths and original arrow placements are implemented
+in `core/workdesk-artwork.ts`. Lower organization relationships retain the
+existing engine routes because the source lower SVG block is hidden.
+Approved card SVGs and company logo files are untouched.