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-metric.api.mdx

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