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/versioned_docs/version-6.1.0/databases/supported/google-bigquery.mdx

@@ -0,0 +1,31 @@
+---
+title: Google BigQuery
+sidebar_label: Google BigQuery
+description: "Google BigQuery is a serverless, highly scalable data warehouse."
+hide_title: true
+---
+
+{/*
+Licensed to the Apache Software Foundation (ASF) under one
+or more contributor license agreements.  See the NOTICE file
+distributed with this work for additional information
+regarding copyright ownership.  The ASF licenses this file
+to you under the Apache License, Version 2.0 (the
+"License"); you may not use this file except in compliance
+with the License.  You may obtain a copy of the License at
+
+  http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing,
+software distributed under the License is distributed on an
+"AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+KIND, either express or implied.  See the License for the
+specific language governing permissions and limitations
+under the License.
+*/}
+
+import { DatabasePage } from '@site/src/components/databases';
+
+export const databaseInfo = {"time_grains":{"SECOND":true,"FIVE_SECONDS":false,"THIRTY_SECONDS":false,"MINUTE":true,"FIVE_MINUTES":true,"TEN_MINUTES":true,"FIFTEEN_MINUTES":true,"THIRTY_MINUTES":true,"HALF_HOUR":false,"HOUR":true,"SIX_HOURS":false,"DAY":true,"WEEK":true,"WEEK_STARTING_SUNDAY":false,"WEEK_STARTING_MONDAY":true,"WEEK_ENDING_SATURDAY":false,"WEEK_ENDING_SUNDAY":false,"MONTH":true,"QUARTER":true,"QUARTER_YEAR":false,"YEAR":true},"module":"superset.db_engine_specs.bigquery","limit_method":1,"limit_clause":true,"joins":true,"subqueries":true,"alias_in_select":true,"alias_in_orderby":true,"time_groupby_inline":false,"alias_to_source_column":false,"order_by_not_in_select":true,"expressions_in_orderby":true,"cte_in_subquery":true,"max_column_name":128,"sql_comments":true,"escaped_colons":true,"masked_encrypted_extra":false,"column_type_mapping":false,"function_names":false,"user_impersonation":false,"file_upload":true,"get_extra_table_metadata":true,"dbapi_exception_mapping":true,"custom_errors":false,"dynamic_schema":false,"catalog":true,"dynamic_catalog":true,"ssh_tunneling":false,"query_cancelation":false,"get_metrics":false,"where_latest_partition":true,"expand_data":false,"query_cost_estimation":true,"sql_validation":false,"score":83,"max_score":201,"documentation":{"description":"Google BigQuery is a serverless, highly scalable data warehouse.","logo":"google-big-query.svg","homepage_url":"https://cloud.google.com/bigquery/","categories":["Cloud - Google","Analytical Databases","Proprietary"],"pypi_packages":["sqlalchemy-bigquery"],"connection_string":"bigquery://{project_id}","install_instructions":"echo \"sqlalchemy-bigquery\" >> ./docker/requirements-local.txt","authentication_methods":[{"name":"Service Account JSON","description":"Upload service account credentials JSON or paste in Secure Extra","secure_extra":{"credentials_info":{"type":"service_account","project_id":"...","private_key_id":"...","private_key":"...","client_email":"...","client_id":"...","auth_uri":"...","token_uri":"..."}}}],"notes":"Create a Service Account via GCP console with access to BigQuery datasets. For CSV/Excel uploads, also install pandas_gbq.","warnings":["Google BigQuery Python SDK is not compatible with gevent. Use a worker type other than gevent when deploying with gunicorn."],"docs_url":"https://github.com/googleapis/python-bigquery-sqlalchemy","category":"Cloud - Google","custom_errors":[{"regex_name":"CONNECTION_DATABASE_PERMISSIONS_REGEX","message_template":"Unable to connect. Verify that the following roles are set on the service account: \"BigQuery Data Viewer\", \"BigQuery Metadata Viewer\", \"BigQuery Job User\" and the following permissions are set \"bigquery.readsessions.create\", \"bigquery.readsessions.getData\"","error_type":"CONNECTION_DATABASE_PERMISSIONS_ERROR","category":"Permissions","description":"Insufficient permissions","issue_codes":[1017]},{"regex_name":"TABLE_DOES_NOT_EXIST_REGEX","message_template":"The table \"%(table)s\" does not exist. A valid table must be used to run this query.","error_type":"TABLE_DOES_NOT_EXIST_ERROR","category":"Query","description":"Table not found","issue_codes":[1003,1005]},{"regex_name":"COLUMN_DOES_NOT_EXIST_REGEX","message_template":"We can't seem to resolve column \"%(column)s\" at line %(location)s.","error_type":"COLUMN_DOES_NOT_EXIST_ERROR","category":"Query","description":"Column not found","issue_codes":[1003,1004]},{"regex_name":"SCHEMA_DOES_NOT_EXIST_REGEX","message_template":"The schema \"%(schema)s\" does not exist. A valid schema must be used to run this query.","error_type":"SCHEMA_DOES_NOT_EXIST_ERROR","category":"Query","description":"Schema not found","issue_codes":[1003,1016]},{"regex_name":"SYNTAX_ERROR_REGEX","message_template":"Please check your query for syntax errors at or near \"%(syntax_error)s\". Then, try running your query again.","error_type":"SYNTAX_ERROR","category":"Query","description":"SQL syntax error","issue_codes":[1030]}]},"engine":"bigquery","engine_name":"Google BigQuery","engine_aliases":[],"default_driver":"bigquery","supports_file_upload":true,"supports_dynamic_schema":false,"supports_catalog":true,"supports_dynamic_catalog":true};
+
+<DatabasePage name="Google BigQuery" database={databaseInfo} />