Add English version of Claude Code article (#46)

* Add English version of Claude Code article

- Full English translation of the Claude Code blog article
- Light-themed SVG diagrams with angular-schule brand colors
- Cross-reference to German version on angular-buch.com
- All shared assets (SVGs, images) included

* claude-code: add author bio and workshop advertising

* claude-code: fix bioHeading to use author name

Author: JohannesHoppe