Implement Google Navigation Flutter integration for turn-by-turn delivery navigation

Adds complete Google Navigation support with:
- LocationPermissionService for runtime location permissions
- NavigationSessionService for session and route management
- NavigationPage for full-screen turn-by-turn navigation UI
- NavigationTermsAndConditionsDialog for service acceptance
- Comprehensive i18n support (English/French)
- Android minSdk=23 with Java NIO desugaring
- iOS location permissions in Info.plist
- Error handling with user-friendly dialogs
- Location update and arrival notifications

Includes detailed setup guide and implementation documentation with API key
configuration instructions, integration examples, and testing checklist.

Generated with Claude Code

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

lib/l10n/app_fr.arb

@@ -65,5 +65,23 @@
       "completed": {"type": "int"},
       "total": {"type": "int"}
     }
-  }
+  },
+  "navigationTcTitle": "Service de Navigation",
+  "navigationTcDescription": "Cette application utilise Google Navigation pour fournir une navigation virage par virage pour les livraisons.",
+  "navigationTcAttribution": "Attribution: Services de cartes et de navigation fournis par Google Maps.",
+  "navigationTcTerms": "En acceptant, vous acceptez les conditions d'utilisation et la politique de confidentialit de Google pour les services de navigation.",
+  "accept": "Accepter",
+  "decline": "Refuser",
+  "locationPermissionRequired": "Permission de localisation",
+  "locationPermissionMessage": "Cette application ncessite la permission de localisation pour naviguer vers les livraisons.",
+  "locationPermissionDenied": "Permission de localisation refuse. La navigation ne peut pas continuer.",
+  "permissionPermanentlyDenied": "Permission requise",
+  "openSettingsMessage": "La permission de localisation est dfinitivement refuse. Veuillez l'activer dans les paramtres de l'application.",
+  "openSettings": "Ouvrir les paramtres",
+  "cancel": "Annuler",
+  "ok": "OK",
+  "requestPermission": "Demander la permission",
+  "navigationArrived": "Vous tes arriv la destination",
+  "navigatingTo": "Navigation vers",
+  "initializingNavigation": "Initialisation de la navigation..."
 }