docs: bifurcate documentation into user, admin, and developer sections

Major restructuring of documentation to separate concerns:

**New Structure:**
- `/docs/` - User-facing docs (intro, quickstart, databases, using-superset, faq)
- `/admin-docs/` - Administrator docs (installation, configuration, security)
- `/developer-docs/` - Developer docs (contributing, extensions, guidelines, testing)

**Changes:**
- Move installation, configuration, and security docs to admin_docs/
- Move contributing, extensions, guidelines, and testing to developer_docs/
- Rename developer_portal to developer_docs (with underscore to hyphen in URL)
- Add sidebarAdminDocs.js for admin documentation navigation
- Update versions-config.json with new doc sections
- Update docusaurus.config.ts with new plugins and redirects
- Update internal links in versioned docs (6.0.0) to use new paths
- Keep user-facing content (databases, using-superset, faq) in main docs

This separation makes it clearer which documentation is relevant for:
- End users exploring and visualizing data
- Administrators deploying and configuring Superset
- Developers contributing to or extending Superset

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

docs/developer_docs/testing/ci-cd.md

@@ -0,0 +1,70 @@
+---
+title: CI/CD and Automation
+sidebar_position: 5
+---
+
+<!--
+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.
+-->
+
+# CI/CD and Automation
+
+🚧 **Coming Soon** 🚧
+
+Understanding Superset's continuous integration and deployment pipelines.
+
+## Topics to be covered:
+
+- GitHub Actions workflows
+- Pre-commit hooks configuration
+- Automated testing pipelines
+- Code quality checks (ESLint, Prettier, Black, MyPy)
+- Security scanning (Dependabot, CodeQL)
+- Docker image building and publishing
+- Release automation
+- Performance benchmarking
+- Coverage reporting and tracking
+
+## Pre-commit Hooks
+
+```bash
+# Install pre-commit hooks
+pre-commit install
+
+# Run all hooks on staged files
+pre-commit run
+
+# Run specific hook
+pre-commit run mypy
+
+# Run on all files (not just staged)
+pre-commit run --all-files
+```
+
+## GitHub Actions
+
+Key workflows:
+- `test-frontend.yml` - Frontend tests
+- `test-backend.yml` - Backend tests
+- `docker.yml` - Docker image builds
+- `codeql.yml` - Security analysis
+- `release.yml` - Release automation
+
+---
+
+*This documentation is under active development. Check back soon for updates!*