Add Shell routes and unify item card layout in pages

[phoneuooyd]

Added explicit Route properties to all ShellContent tabs in AppShell.xaml for improved navigation. Updated IngredientsPage and RecipesPage to use Frame instead of Border for item cards, added tap gesture recognizers for editing, and aligned their layouts for consistency with PlannerPage.

[phoneuooyd]

This pull request introduces several improvements and updates across the application, focusing on ingredient data accuracy, localization, and input validation. The most significant changes include refining the ingredient database for better specificity, improving localization and labeling, and enhancing input handling for numeric fields.

Ingredient Database Refinement:

• Updated ingredients.json to improve specificity and accuracy of ingredient names and nutritional values (e.g., splitting "Mleko" into "Mleko 3.2", "Mleko 2.0", "Mleko 1.5"; renaming "Twaróg" to specific fat-content variants; updating rice and potato entries; updating yogurt entries with specific brands and nutrition; correcting nutritional values for several ingredients) [1] [2] [3] [4] [5] [6] [7] [8] [9].
• Removed several generic, duplicate, or less relevant ingredients (e.g., "Jogurt", "Dżem", "Sos Worcestershire", various alcoholic beverages, and some baked goods) to streamline the ingredient list [1] [2] [3] [4] [5] [6] [7] [8] [9].

Localization and UI Label Improvements:

• Updated Polish and English resource files for the Add Recipe page to use more accurate and user-friendly terms (e.g., changing "Description" to "Instructions" and updating placeholders to clarify input expectations) [1] [2] [3].
• Added explicit Route attributes to each ShellContent in AppShell.xaml for better navigation and maintainability.

Input Validation and Parsing Enhancements:

• Improved numeric input validation in AddRecipeViewModel to handle both comma and dot as decimal separators, and to reject empty or whitespace-only values, ensuring more robust data entry [1] [2].
• Refactored recipe save logic to use a helper method for parsing doubles, ensuring consistent handling of decimal separators and default values [1] [2].

ViewModel and Service Integration:

• Updated HomeViewModel to inject and subscribe to ILocalizationService, allowing the view model to react to culture changes and refresh display properties accordingly [1] [2].

These updates collectively improve data quality, user experience, and input reliability throughout the application.