chore: archive completed OpenSpec changes

Archive all 6 deployed changes following OpenSpec workflow:
- add-minimal-hugo-site → hugo-site spec
- add-multilingual-support → internationalization spec
- migrate-site-content → content-migration + image-assets specs
- add-custom-bootstrap-styling → styling spec
- add-cv-page → content-management spec
- simple-deployment → deployment spec

All changes moved to archive/ with 2025-10-30 date prefix.
Created 7 capability specs reflecting deployed functionality.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

openspec/changes/archive/2025-10-30-add-minimal-hugo-site/proposal.md

@@ -0,0 +1,15 @@
+## Why
+The current markusgraf.ch website uses static HTML files. Converting to Hugo will provide a maintainable template-based structure that simplifies future content updates and enables easy addition of new sections (CV, blog) without duplicating code.
+
+## What Changes
+- Initialize Hugo project structure with standard directories
+- Create base layout template with Bootstrap 5.x integration
+- Set up reusable partials (header, footer, navigation)
+- Convert existing HTML content to Hugo templates
+- Configure Hugo site settings
+- Add static assets from current website
+
+## Impact
+- Affected specs: hugo-site (new capability)
+- Affected code: This is a greenfield implementation - no existing code affected
+- Migration: Current static HTML will be referenced to recreate in Hugo templates