feat: add recipes module with CRUD functionality and integrate with meals

- Implemented new recipes page with UI for managing recipes.
- Added REST API routes for recipes including create, read, update, and delete operations.
- Introduced database schema for recipes and recipe ingredients.
- Updated meals to link with recipes, allowing meals to reference specific recipes.
- Enhanced validation for recipe-related fields in meals.
- Added styles for the recipes page and components.

public/styles/tokens.css

@@ -154,6 +154,8 @@
   --module-calendar:   var(--_module-calendar);    /* Violett - Termine, Zeit */
   --_module-meals:     #C2410C;
   --module-meals:      var(--_module-meals);       /* Orange-700 - Essen, Wärme */
+  --_module-recipes:   #0D9488;
+  --module-recipes:    var(--_module-recipes);     /* Teal-600 - Rezepte */
   --_module-shopping:  #DB2777;
   --module-shopping:   var(--_module-shopping);    /* Pink-600 - Einkaufen (trennt von Meals) */
   --_module-notes:     #A16207;