start implementing edit_recipe

frontend/views/recipes/recipe_manager.py

@@ -0,0 +1,14 @@
+from .recipe import V60, ESPRESSO
+
+class RecipeManager:
+    def __init__(self):
+        self.recipes = [
+            V60,
+            ESPRESSO
+        ]
+    
+    def add_recipe(self, recipe):
+        self.recipes.append(recipe)
+    
+    def remove_recipe(self, recipe):
+        self.recipes.remove(recipe)