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/delete-a-dataset.api.mdx

@@ -0,0 +1,68 @@
+---
+id: delete-a-dataset
+title: "Delete a dataset"
+description: "Delete a dataset"
+sidebar_label: "Delete a dataset"
+hide_title: true
+hide_table_of_contents: true
+api: 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
+sidebar_class_name: "delete 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={"Delete a dataset"}
+>
+</Heading>
+
+<MethodEndpoint
+  method={"delete"}
+  path={"/api/v1/dataset/{pk}"}
+  context={"endpoint"}
+>
+
+</MethodEndpoint>
+
+
+
+Delete a dataset
+
+<Heading
+  id={"request"}
+  as={"h2"}
+  className={"openapi-tabs__heading"}
+>
+  <Translate id="theme.openapi.request.title">Request</Translate>
+</Heading>
+
+<ParamsDetails
+  {...require("./delete-a-dataset.ParamsDetails.json")}
+>
+
+</ParamsDetails>
+
+<RequestSchema
+  {...require("./delete-a-dataset.RequestSchema.json")}
+>
+
+</RequestSchema>
+
+<StatusCodes
+  {...require("./delete-a-dataset.StatusCodes.json")}
+>
+
+</StatusCodes>