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-custom-bootstrap-styling/proposal.md

@@ -0,0 +1,18 @@
+## Why
+The site currently uses Bootstrap 5.3.2 from CDN with default styling. To establish a unique visual identity and brand consistency, we need the ability to customize Bootstrap variables (font sizes, colors, spacing) and add custom styles without modifying the core framework.
+
+## What Changes
+- Add Hugo SCSS/SASS processing pipeline using Hugo Pipes
+- Create custom SCSS file structure for Bootstrap variable overrides and custom styles
+- Maintain Bootstrap CSS from CDN for core framework
+- Compile custom styles to supplement Bootstrap defaults
+- Enable customization of heading font sizes, link colors, and other design tokens
+
+## Impact
+- Affected specs: `styling` (new capability)
+- Affected code:
+  - `layouts/_default/baseof.html` - Update to include compiled custom CSS
+  - `assets/scss/` - New directory for SCSS files
+  - `hugo.toml` - May need configuration for SCSS processing
+- No breaking changes to existing functionality
+- Performance: Minimal impact, adds one additional CSS file (~few KB)