docs: cut 6.1.0 versions for docs, admin_docs, developer_docs, components

Snapshots all four versioned Docusaurus sections at v6.1.0. Built on
top of the version-cutting tooling work in chore/docs-cut-6.1.0-versions
so the snapshot benefits from:

- Auto-gen refresh before snapshotting (database pages from engine
  spec metadata, API reference from openapi.json, component pages
  from Storybook stories) — captured at the SHA we cut from rather
  than whatever happened to be on disk.
- Data-import freeze: country list, feature flag table, database
  diagnostics, and component metadata are copied into snapshot-local
  `_versioned_data/` dirs so the historical version doesn't silently
  mutate when the source files change.
- Depth-aware import-path rewriter that handles deeply-nested
  component MDX files referencing `../../../src/` from the snapshot.

Versioning behavior: `lastVersion` stays at `current` for every
section, so the canonical URLs (`/docs/...`, `/admin-docs/...`,
`/developer-docs/...`, `/components/...`) continue to render content
from master. The `current` version is consistently labeled "Next"
with an `unreleased` banner, and `6.1.0` is a historical pin
accessible only via its explicit version segment.

Component playground: previously `disabled: true` in versions-config.json,
now enabled and versioned. The plugin block in docusaurus.config.ts
was already gated only by the `disabled` flag, so no other code
changes were needed to bring it back online.

The frozen `databases.json` in the snapshot is the canonical 80-database
artifact from the latest committed state in master (preserved by the
generator's input-hash cache), not a fallback regenerated from a
local Flask environment.

docs/developer_docs_versioned_docs/version-6.1.0/api/duplicate-a-dataset.api.mdx

@@ -0,0 +1,66 @@
+---
+id: duplicate-a-dataset
+title: "Duplicate a dataset"
+description: "Duplicate a dataset"
+sidebar_label: "Duplicate a dataset"
+hide_title: true
+hide_table_of_contents: true
+api: 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
+sidebar_class_name: "post api-method"
+info_path: developer-docs/api/superset
+custom_edit_url: null
+hide_send_button: true
+show_extensions: true
+---
+
+import MethodEndpoint from "@theme/ApiExplorer/MethodEndpoint";
+import ParamsDetails from "@theme/ParamsDetails";
+import RequestSchema from "@theme/RequestSchema";
+import StatusCodes from "@theme/StatusCodes";
+import OperationTabs from "@theme/OperationTabs";
+import TabItem from "@theme/TabItem";
+import Heading from "@theme/Heading";
+import Translate from "@docusaurus/Translate";
+
+<Heading
+  as={"h1"}
+  className={"openapi__heading"}
+  children={"Duplicate a dataset"}
+>
+</Heading>
+
+<MethodEndpoint
+  method={"post"}
+  path={"/api/v1/dataset/duplicate"}
+  context={"endpoint"}
+>
+
+</MethodEndpoint>
+
+
+
+Duplicate a dataset
+
+<Heading
+  id={"request"}
+  as={"h2"}
+  className={"openapi-tabs__heading"}
+>
+  <Translate id="theme.openapi.request.title">Request</Translate>
+</Heading>
+
+<ParamsDetails>
+
+</ParamsDetails>
+
+<RequestSchema
+  {...require("./duplicate-a-dataset.RequestSchema.json")}
+>
+
+</RequestSchema>
+
+<StatusCodes
+  {...require("./duplicate-a-dataset.StatusCodes.json")}
+>
+
+</StatusCodes>