feat(docs): add comprehensive documentation platform architecture and guides

Created a complete documentation system for new documentors, including
interactive architecture diagrams and step-by-step guides for all documentation
workflows.

New LikeC4 architecture project (resources/doc-likec4/):
- Created documentation-platform.c4 model with 252 lines covering:
  * Actors: documentor, reviewer, CI system, edge platform
  * Tools: Hugo, LikeC4, Git, VS Code, markdownlint, htmltest
  * Processes: local development, testing, CI/CD pipeline
  * Repositories: git repo, cloudlet registry
- Defined 6 comprehensive views:
  * overview: Complete documentation platform ecosystem
  * localDevelopment: Local writing and preview workflow
  * cicdPipeline: Automated testing and validation
  * deploymentFlow: From commit to production
  * fullWorkflow: End-to-end documentation lifecycle
  * testingCapabilities: Quality assurance toolchain

New documentation pages (content/en/docs/documentation/):
- _index.md: Overview and introduction for new documentors
- local-development.md: Setting up local environment, live preview
- testing.md: Running markdown, HTML, and link validation
- cicd.md: Understanding automated CI/CD pipeline
- publishing.md: Deployment to Edge Connect Munich cloudlet
- quick-reference.md: Command reference and common tasks

Hugo shortcode for embedding LikeC4 diagrams:
- Created layouts/shortcodes/likec4-view.html
- Supports loading state with animated indicator
- Graceful error handling for missing views
- Automatic shadow DOM checking to ensure webcomponent loaded
- Usage: {{< likec4-view view="viewId" project="projectName" >}}

Supporting documentation:
- resources/LIKEC4-REGENERATION.md: Guide for regenerating webcomponents
- All diagrams are interactive and explorable in the browser
- Views include zoom, pan, and element inspection

This implementation provides:
1. Self-documenting documentation platform ("meta-documentation")
2. Visual learning for complex workflows via interactive diagrams
3. Clear separation of concerns (6 focused views vs 1 overwhelming diagram)
4. Onboarding path for new team members
5. Living architecture documentation that evolves with the platform

All new documentation passes markdown linting and builds successfully.

resources/doc-likec4/likec4.config.json

@@ -0,0 +1,3 @@
+{
+  "name": "documentation-platform"
+}