docs(wiki): remove AI/Claude references from dev pages
Replaces references to CLAUDE.md and Claude Code slash commands with
neutral equivalents (project conventions, plain gh commands). The
practices themselves (backlog→branch→ship, fakes-over-mocks, mandatory
pre-fix test protocol) stay — only the AI tooling attribution is
stripped.
docs(wiki): reorganise into user (multi-locale) + developer (English) split
- Split every topic into User- and Dev- prefixed pages
- User wiki translated into 7 locales (en, de, fr, it, es, pt, da)
matching the 11 implemented country APIs
- Dev wiki in English, 19 pages covering architecture, code patterns,
quality, deep dives (OBD2, fuzzy predictions, i18n), and workflow
- Home.md is now a locale picker + dev entry
- _Sidebar.md grouped by locale and dev section
- Removed 12 legacy mixed-style pages (User-Guide, Features, FAQ,
Getting-Started, Architecture, CI-CD, Contributing, Testing,
Localization, Security, Reporting-Issues, Adding-a-Country)
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>