feat(marketing-website): add BreakPilot marketing website with CMP integration

Multi-page marketing website positioned as "Deterministic Regulatory Engineering Platform":
- 7 pages: Home, Plattform, CE-Prozess, Product Compliance, Architektur, Team, Preise
- Platform Bridge animation (adapted from pitch-deck USP slide)
- Cookie-Banner with consent-service integration (breakpilot-marketing site)
- DE/EN language toggle + Dark/Light theme
- Docker service on port 3014

[guardrail-change] PlatformBridgeSection.tsx added to loc-exceptions (816 LOC, SVG animation)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

marketing-website/lib/context.tsx

@@ -0,0 +1,51 @@
+'use client'
+
+import { createContext, useContext, useState, useCallback, useEffect, ReactNode } from 'react'
+
+type Language = 'de' | 'en'
+type Theme = 'dark' | 'light'
+
+interface AppContextType {
+  lang: Language
+  theme: Theme
+  toggleLang: () => void
+  toggleTheme: () => void
+}
+
+const AppContext = createContext<AppContextType>({
+  lang: 'de',
+  theme: 'dark',
+  toggleLang: () => {},
+  toggleTheme: () => {},
+})
+
+export function AppProvider({ children }: { children: ReactNode }) {
+  const [lang, setLang] = useState<Language>('de')
+  const [theme, setTheme] = useState<Theme>('dark')
+
+  const toggleLang = useCallback(() => {
+    setLang(prev => prev === 'de' ? 'en' : 'de')
+  }, [])
+
+  const toggleTheme = useCallback(() => {
+    setTheme(prev => {
+      const next = prev === 'dark' ? 'light' : 'dark'
+      document.documentElement.classList.toggle('theme-light', next === 'light')
+      return next
+    })
+  }, [])
+
+  useEffect(() => {
+    document.documentElement.classList.toggle('theme-light', theme === 'light')
+  }, [theme])
+
+  return (
+    <AppContext.Provider value={{ lang, theme, toggleLang, toggleTheme }}>
+      {children}
+    </AppContext.Provider>
+  )
+}
+
+export function useApp() {
+  return useContext(AppContext)
+}