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/duplicate-a-dataset.api.mdx

@@ -0,0 +1,68 @@
+---
+id: duplicate-a-dataset
+title: "Duplicate a dataset"
+description: "Duplicate a dataset"
+sidebar_label: "Duplicate a dataset"
+hide_title: true
+hide_table_of_contents: true
+api: eJzdV21v2zYQ/ivEYUATTImTrAUKFv2Qpi3armiD2t0LoiClxUvERiJVknLiCfrvw5GSLDvOMLQDAuyTZYp3vOe5546nBix+q9H5F0YugTeQGe1Re3oUVVWoTHhl9OSrM5rWXJZjKeipsqZC6xU6+jcXDi9KI7G4UJIW/LJC4KC0xyu00CbgxbzACy1KpPeluH2P+srnwI+eHCRQKt3/P0x6a+et0lfQtkkIU1mUwM82DlvzfD7YmvlXzDy9Vb6ghZfCC4f+ZR1R4TRCaRPAW1FWBW7Bcbge9iqgNgGJLrOqInpW3llH0Dhgb2sMCFxltIt8HR0c/gDbaxTrupxHhi26uvD/q+S0mybr6epytAL+r/N3bwJlH4Kksx4fHPxAnkp0TlzhiPIRaf+EazCEF0KyrkQ5e6sXolCSVcKKEj1axyprFkpSsHchjWwjlh/R3H+A5bMWtc+NVX+h5Oy49jlq353PBg1tATI2jEh+eVgkr42dKylRc/anqZk0+pFnuVggq9CWyjlC5A0TWYbOMZ8rxyw6U9sMtwEc/EV0jx8W3Qfj2aWpteRslmMvIZQDBCYNOqaNZ3irSFx3EQ0+AqKjo4dWXmUNpYKaASPV+SVnv1ExRfWhtcZuw3Fi6kIGqJ2HzpqOevLQzeGt9mi1KJhDu0AbUXB2rFmt8bbCjJIWFpnJstreU16vhRfFQEECDrPaEkZ+1sDXGw/87Lyl5i2uHLX4rlU6aui3e5mROA3BuWBQCH0FHLLPn95DAoWYY7H625UAh6y2Bdv7g51+nM5YCrn3FZ9MCpOJIjfO86cHT59ORKUmi8OJjOdNhtacAkvTVDO294alcNz1hkA7Zy9QWLTsp+OTk1fT6cXs46+vPqwbnMSE7c2WFXK2mbPVXskeNSlc4zIFzlJYiKLGFNpH0CYDzNOlz40eAR0WBqiqrIz1fRm5VKe6nwXY82F5vzLO79C57Dv4SKJhjkKidc+bDVYigI6ZFNjPXWe68OYaddtZE/rn2xCnejfVlVXa7/SR79Pmnd3dMRfvxEJMg65GfKwtrtJvtCNKBhrEjVCeXaLP8kDCd1LQRCQl+txIgkD62qSH99vYpnoI9pdeQE3kaBYo+pKsTMb6iUTd1VDc3TM7N3LJ2bvpxw/7scjV5XKnYde4HNHM2l3aTWw/S3VkiHAO7Gxw320yBe4X5mqHtu4+AyrUjcmm54gJ1vEGCUSKgAPpDhKoBI13cC/BlL3QZWKV15aSuzVHsBnAe3rNJC6wMFWJ2nf9KmgnOmoqa7zJTNHyyaQhVy1vqGzaO95OaudN2btIYCGsorbuuhYb3NCzxEsRxsIQJiSAui6pf3V/6Sf0sHX/b2azUzb4aROgaNb9DXjvBDeNjZje0cjJjGVvT8kJYVl3spWqzj7sblvKZd+Mw0QcQYaW3MA86PS1saUgf+9+n1GOwjbg3VsYrpIAuk3I+MLipUWXf68T8uKM/rT6cnx17xfUwT0TeAJKX5rIyBoBdYU2KrT/NhgtkfzivsVhZNX5UoRrtvO/XexrZwz3rcdbP6kKocLYFYTYdHVwBqJSdOAhWa/8DNVw3uviDJqGMH+2RdvS8rcaLV2d5ytphgs0gdh+Qvlc4zIMF6tGEpRc1BTXnSmC6iRaHGcZhk56/97zUW1T94ME5t3HPaUFOFhxQx+o4gY4QAIm8BKUFdZiP6/jiBF9UsppBB+RN0ijeyBU3Suhl6MImybuiH2U6jlCCVcPtOdt2/4NMdy0Tw==
+sidebar_class_name: "post 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={"Duplicate a dataset"}
+>
+</Heading>
+
+<MethodEndpoint
+  method={"post"}
+  path={"/api/v1/dataset/duplicate"}
+  context={"endpoint"}
+>
+
+</MethodEndpoint>
+
+
+
+Duplicate a dataset
+
+<Heading
+  id={"request"}
+  as={"h2"}
+  className={"openapi-tabs__heading"}
+>
+  <Translate id="theme.openapi.request.title">Request</Translate>
+</Heading>
+
+<ParamsDetails
+  parameters={undefined}
+>
+
+</ParamsDetails>
+
+<RequestSchema
+  {...require("./duplicate-a-dataset.RequestSchema.json")}
+>
+
+</RequestSchema>
+
+<StatusCodes
+  {...require("./duplicate-a-dataset.StatusCodes.json")}
+>
+
+</StatusCodes>