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/execute-a-sql-query.RequestSchema.json

@@ -0,0 +1 @@
+{"title":"Body","body":{"content":{"application/json":{"schema":{"properties":{"catalog":{"nullable":true,"type":"string"},"client_id":{"nullable":true,"type":"string"},"ctas_method":{"nullable":true,"type":"string"},"database_id":{"type":"integer"},"expand_data":{"nullable":true,"type":"boolean"},"json":{"nullable":true,"type":"boolean"},"queryLimit":{"nullable":true,"type":"integer"},"runAsync":{"nullable":true,"type":"boolean"},"schema":{"nullable":true,"type":"string"},"select_as_cta":{"nullable":true,"type":"boolean"},"sql":{"type":"string"},"sql_editor_id":{"nullable":true,"type":"string"},"tab":{"nullable":true,"type":"string"},"templateParams":{"nullable":true,"type":"string"},"tmp_table_name":{"nullable":true,"type":"string"}},"required":["database_id","sql"],"type":"object","title":"ExecutePayloadSchema"},"example":{"catalog":"string","client_id":"string","ctas_method":"string","database_id":1,"expand_data":true,"json":true,"queryLimit":1,"runAsync":true,"schema":"string","select_as_cta":true,"sql":"string","sql_editor_id":"string","tab":"string","templateParams":"string","tmp_table_name":"string"}}},"description":"SQL query and params","required":true}}