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/delete-a-dataset-metric.api.mdx

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