feat: modernize UI and implement comprehensive Task Management features

### 🔖 Enhancement description

Hi Appwrite Team!
I have successfully integrated this starter kit with Appwrite Cloud. Currently, the project serves as a great foundation but the UI is very minimal (it just displays "Todo").
I would like to contribute by:
Modernizing the UI: Updating the layout with a more polished and responsive design.
Full Task Logic: Implementing Create, Read, and Delete (CRUD) operations for tasks using Appwrite Databases.
Better UX: Adding loading indicators and handling empty states.
I'm excited to make this starter kit more functional for the community. Can you please assign this issue to me?

### 🎤 Pitch

"A better UI makes the starter kit more welcoming for the community.

### 👀 Have you spent some time to check if this issue has been raised before?

- [x] I checked and didn't find similar issue

### 🏢 Have you read the Code of Conduct?

- [x] I have read the [Code of Conduct](https://github.com/appwrite/.github/blob/main/CODE_OF_CONDUCT.md)

Beginne mit der Untersuchung der bestehenden Todo UI und der aktuellen Appwrite Cloud Database-Integration. Definiere den Umfang der responsiven Neugestaltung und der Aufgabenoperationen, bevor du etwas änderst. Als abgeschlossen gilt die Arbeit, wenn das Starter-Kit das Erstellen, Lesen und Löschen von Aufgaben unterstützt und Ladeanzeigen sowie Leerzustände in der UI sichtbar sind.

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