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

- Snapshot all four versioned docs sections at v6.1.0; master continues to
  serve as "Next" (lastVersion: current, banner: unreleased) so editing
  master keeps updating the canonical URLs
- Enable the previously-disabled components plugin and version it
- Rename stale "developer_portal" references to "developer_docs" across
  package.json scripts, manage-versions.mjs, theme files (DocVersionBadge,
  DocVersionBanner), DOCS_CLAUDE.md, and README.md (URL backward-compat
  redirect /developer_portal/* preserved)
- Add admin_docs version scripts; drop dead "tutorials" plugin id from
  the version badge
- Generalize fixVersionedImports in manage-versions.mjs to walk every
  section's snapshot and rewrite ../../src/ and ../../data/ imports,
  catching admin_docs and components files that previous version cuts
  would have broken
- Remove orphan files: developer_portal_versions.json,
  tutorials_versions.json, and stray empty versions.json files inside
  components/ and developer_docs/ content directories

docs/developer_docs_versioned_docs/version-6.1.0/api/get-api-by-version-openapi.api.mdx

@@ -0,0 +1,68 @@
+---
+id: get-api-by-version-openapi
+title: "Get api by version  openapi"
+description: "Get the OpenAPI spec for a specific API version"
+sidebar_label: "Get api by version  openapi"
+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 api by version  openapi"}
+>
+</Heading>
+
+<MethodEndpoint
+  method={"get"}
+  path={"/api/{version}/_openapi"}
+  context={"endpoint"}
+>
+
+</MethodEndpoint>
+
+
+
+Get the OpenAPI spec for a specific API version
+
+<Heading
+  id={"request"}
+  as={"h2"}
+  className={"openapi-tabs__heading"}
+>
+  <Translate id="theme.openapi.request.title">Request</Translate>
+</Heading>
+
+<ParamsDetails
+  {...require("./get-api-by-version-openapi.ParamsDetails.json")}
+>
+
+</ParamsDetails>
+
+<RequestSchema
+  {...require("./get-api-by-version-openapi.RequestSchema.json")}
+>
+
+</RequestSchema>
+
+<StatusCodes
+  {...require("./get-api-by-version-openapi.StatusCodes.json")}
+>
+
+</StatusCodes>