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/create-security-roles.api.mdx

@@ -0,0 +1,66 @@
+---
+id: create-security-roles
+title: "Create security roles"
+description: "Create security roles"
+sidebar_label: "Create security roles"
+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={"Create security roles"}
+>
+</Heading>
+
+<MethodEndpoint
+  method={"post"}
+  path={"/api/v1/security/roles/"}
+  context={"endpoint"}
+>
+
+</MethodEndpoint>
+
+
+
+Create security roles
+
+<Heading
+  id={"request"}
+  as={"h2"}
+  className={"openapi-tabs__heading"}
+>
+  <Translate id="theme.openapi.request.title">Request</Translate>
+</Heading>
+
+<ParamsDetails>
+
+</ParamsDetails>
+
+<RequestSchema
+  {...require("./create-security-roles.RequestSchema.json")}
+>
+
+</RequestSchema>
+
+<StatusCodes
+  {...require("./create-security-roles.StatusCodes.json")}
+>
+
+</StatusCodes>