[Frontend] Cart Functionality

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• Implement a shopping cart that allows users to interact with the items they want to purchase.
• Users should be able to add cakes to the cart, remove cakes from the cart, and adjust the quantity of each cake.
• Additionally, each line item in the cart should have an optional field where the user can input a custom text of maximum of 25 characters, which will be added to the cake.

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The app should be mobile responsive. Feel free to use any Vue.js tools and libraries that you are comfortable with. You are encouraged to focus on simplicity and functionality while implementing the required features. Good luck, and happy coding!