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

Snapshots all four versioned Docusaurus sections at v6.1.0, cut from
master after the version-cutting tooling (#39837), broken-internal-
links fix (#40102), and user_docs rename (#40171) all landed. With
the rename in place, all four sections now produce parallel-named
files at the docs/ root (no more bare `versioned_docs/` outlier).

Versioning behavior: lastVersion stays at current for every section,
so the canonical URLs (/user-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.

Snapshot includes:
- All MDX content for the four sections.
- Auto-gen captured fresh: 74 database pages (engine spec metadata),
  ~1,800 API reference files (openapi.json), 59 component pages
  (Storybook stories).
- Data imports frozen at cut time into snapshot-local _versioned_data/
  dirs:
    user_docs_versioned_docs/version-6.1.0/_versioned_data/src/data/databases.json
      (canonical 80-database diagnostics from master, preserved by the
      generator's input-hash cache)
    admin_docs_versioned_docs/version-6.1.0/_versioned_data/data/countries.json
    admin_docs_versioned_docs/version-6.1.0/_versioned_data/static/feature-flags.json
    developer_docs_versioned_docs/version-6.1.0/_versioned_data/static/data/components.json
- Import paths in deeply-nested files rewritten so they still resolve
  from one directory deeper inside the snapshot.
- developer_docs/extensions/overview.md snapshot has the FIXED
  ./mcp.md form (from #40102), so the SPA-nav 404 isn't baked into
  the 6.1.0 version.

Verified via full yarn build: exit 0, no broken links surfaced by
onBrokenLinks: throw.

docs/developer_docs_versioned_docs/version-6.1.0/api/get-security-users-by-pk.api.mdx

@@ -0,0 +1,68 @@
+---
+id: get-security-users-by-pk
+title: "Get security users by pk"
+description: "Get an item model"
+sidebar_label: "Get security users by pk"
+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 security users by pk"}
+>
+</Heading>
+
+<MethodEndpoint
+  method={"get"}
+  path={"/api/v1/security/users/{pk}"}
+  context={"endpoint"}
+>
+
+</MethodEndpoint>
+
+
+
+Get an item model
+
+<Heading
+  id={"request"}
+  as={"h2"}
+  className={"openapi-tabs__heading"}
+>
+  <Translate id="theme.openapi.request.title">Request</Translate>
+</Heading>
+
+<ParamsDetails
+  {...require("./get-security-users-by-pk.ParamsDetails.json")}
+>
+
+</ParamsDetails>
+
+<RequestSchema
+  {...require("./get-security-users-by-pk.RequestSchema.json")}
+>
+
+</RequestSchema>
+
+<StatusCodes
+  {...require("./get-security-users-by-pk.StatusCodes.json")}
+>
+
+</StatusCodes>