feat: bootstrap design kit and vaporwave demo baseline

exports/schema/bundle-manifest.schema.yaml

@@ -0,0 +1,39 @@
+$schema: "informational"
+title: UI Design Code Bundle Manifest (informal schema)
+type: object
+required:
+  - id
+  - version
+  - description
+  - entries
+properties:
+  id:
+    type: string
+  version:
+    type: integer
+  description:
+    type: string
+  conflict_policy:
+    type: string
+    enum: [overwrite, skip, merge-manual]
+  variables:
+    type: array
+    items:
+      type: object
+      required: [name]
+      properties:
+        name: { type: string }
+        required: { type: boolean }
+        default: {}
+  entries:
+    type: array
+    items:
+      type: object
+      required: [from, to]
+      properties:
+        from: { type: string, description: "path under kit/" }
+        to: { type: string, description: "path under host repo root" }
+        template: { type: boolean }
+        mode: { type: string, enum: [file, dir] }
+        conflict_policy: { type: string, enum: [overwrite, skip, merge-manual] }
+