feat: implement recipe analysis service and data models

- Added RecipeAnalysisService to handle recipe ingredient analysis, including methods for checking ingredient availability and calculating quantities.
- Introduced new TypeScript definitions for recipe analysis results, including ingredient status and summary.
- Created corresponding Dart models for recipe analysis, including RecipeIngredientAnalysis, RecipeAnalysisSummary, and RecipeShoppingCandidate.
- Updated Flutter UI to reflect changes in ingredient availability status.
- Fixed color opacity issue in recipe image card.

flutter/lib/core/api/api_paths.dart

@@ -45,6 +45,7 @@ class RecipeApiPaths {
   static String share(int id) => '/recipes/$id/share';
   static String unshare(int id, String username) => '/recipes/$id/share/${Uri.encodeComponent(username)}';
   static String inventoryPreview(int id) => '/recipes/$id/inventory-preview';
+  static String analysis(int id) => '/recipes/$id/analysis';
   static const parseMarkdown = '/recipes/parse-markdown';
   static const aiSuggestions = '/recipes/ai-suggestions';
 }