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-a-dashboards-chart-definitions.api.mdx

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