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-dashboards-permanent-link-state.api.mdx

@@ -0,0 +1,68 @@
+---
+id: get-dashboards-permanent-link-state
+title: "Get dashboard's permanent link state"
+description: "Get dashboard's permanent link state"
+sidebar_label: "Get dashboard's permanent link state"
+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 dashboard's permanent link state"}
+>
+</Heading>
+
+<MethodEndpoint
+  method={"get"}
+  path={"/api/v1/dashboard/permalink/{key}"}
+  context={"endpoint"}
+>
+
+</MethodEndpoint>
+
+
+
+Get dashboard's permanent link state
+
+<Heading
+  id={"request"}
+  as={"h2"}
+  className={"openapi-tabs__heading"}
+>
+  <Translate id="theme.openapi.request.title">Request</Translate>
+</Heading>
+
+<ParamsDetails
+  {...require("./get-dashboards-permanent-link-state.ParamsDetails.json")}
+>
+
+</ParamsDetails>
+
+<RequestSchema
+  {...require("./get-dashboards-permanent-link-state.RequestSchema.json")}
+>
+
+</RequestSchema>
+
+<StatusCodes
+  {...require("./get-dashboards-permanent-link-state.StatusCodes.json")}
+>
+
+</StatusCodes>