feat: bootstrap design kit and vaporwave demo baseline

kit/patterns/operator-tools/README.md

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+# Operator Tools Pattern
+
+Universal pattern for complex operator/admin dashboards in Go web applications.
+
+This pattern standardizes:
+
+- scope tabs and queue/status filters
+- operations queue tables with row actions
+- batch actions with explicit selection
+- import/export shortcuts near operator workflows
+- safety checklists and confirmation routing
+
+See `contract.md` for behavior rules.