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/create-a-saved-query.StatusCodes.json

@@ -0,0 +1 @@
+{"responses":{"201":{"content":{"application/json":{"schema":{"properties":{"id":{"type":"string"},"result":{"properties":{"catalog":{"maxLength":256,"nullable":true,"type":"string"},"db_id":{"nullable":true,"type":"integer"},"description":{"nullable":true,"type":"string"},"extra_json":{"nullable":true,"type":"string"},"label":{"maxLength":256,"nullable":true,"type":"string"},"schema":{"maxLength":128,"nullable":true,"type":"string"},"sql":{"nullable":true,"type":"string"},"template_parameters":{"nullable":true,"type":"string"}},"type":"object","title":"SavedQueryRestApi.post"}},"type":"object"},"example":{"id":"string","result":{"catalog":"string","db_id":1,"description":"string","extra_json":"string","label":"string","schema":"string","sql":"string","template_parameters":"string"}}}},"description":"Item inserted"},"400":{"content":{"application/json":{"schema":{"properties":{"message":{"type":"string"}},"type":"object"},"example":{"message":"Bad request: Invalid parameters provided"}}},"description":"Bad request"},"401":{"content":{"application/json":{"schema":{"properties":{"message":{"type":"string"}},"type":"object"},"example":{"message":"Unauthorized: Authentication required"}}},"description":"Unauthorized"},"422":{"content":{"application/json":{"schema":{"properties":{"message":{"type":"string"}},"type":"object"},"example":{"message":"Unprocessable entity: Validation error"}}},"description":"Could not process entity"},"500":{"content":{"application/json":{"schema":{"properties":{"message":{"type":"string"}},"type":"object"},"example":{"message":"Internal server error: An unexpected error occurred"}}},"description":"Fatal error"}}}