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/get-a-database.api.mdx

@@ -0,0 +1,68 @@
+---
+id: get-a-database
+title: "Get a database"
+description: "Get a database"
+sidebar_label: "Get a database"
+hide_title: true
+hide_table_of_contents: true
+api: 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
+sidebar_class_name: "get 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={"Get a database"}
+>
+</Heading>
+
+<MethodEndpoint
+  method={"get"}
+  path={"/api/v1/database/{pk}"}
+  context={"endpoint"}
+>
+
+</MethodEndpoint>
+
+
+
+Get a database
+
+<Heading
+  id={"request"}
+  as={"h2"}
+  className={"openapi-tabs__heading"}
+>
+  <Translate id="theme.openapi.request.title">Request</Translate>
+</Heading>
+
+<ParamsDetails
+  {...require("./get-a-database.ParamsDetails.json")}
+>
+
+</ParamsDetails>
+
+<RequestSchema
+  {...require("./get-a-database.RequestSchema.json")}
+>
+
+</RequestSchema>
+
+<StatusCodes
+  {...require("./get-a-database.StatusCodes.json")}
+>
+
+</StatusCodes>