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-permissions-by-pk.api.mdx

@@ -0,0 +1,68 @@
+---
+id: get-security-permissions-by-pk
+title: "Get security permissions by pk"
+description: "Get an item model"
+sidebar_label: "Get security permissions 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 permissions by pk"}
+>
+</Heading>
+
+<MethodEndpoint
+  method={"get"}
+  path={"/api/v1/security/permissions/{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-permissions-by-pk.ParamsDetails.json")}
+>
+
+</ParamsDetails>
+
+<RequestSchema
+  {...require("./get-security-permissions-by-pk.RequestSchema.json")}
+>
+
+</RequestSchema>
+
+<StatusCodes
+  {...require("./get-security-permissions-by-pk.StatusCodes.json")}
+>
+
+</StatusCodes>