Feature: add sample directory with jupyter notebook

Overview

This proposal aims to streamline the onboarding process for new Databend users by providing a collection of interactive Jupyter notebooks.

Current Challenges

• High entry barrier for users without Rust or SQL background
• Complex setup process for new users
• Limited interactive learning resources
• Need for more structured hands-on examples

Proposed Solution

1. Environment Setup

• Single command deployment
• Cloud or local configuration

2. Learning Modules

• Basic SQL operations
• Data transformation
• Advanced analytics
• Best practices

3. Tutorial Structure

• Progressive examples
• Real-world scenarios
• Integration guides

For example: https://github.com/treeverse/lakeFS-samples/tree/main/00_notebooks