[ZEPPELIN-6224] Enhance Spark Basic Features tutorial notebook with more diverse and practical examples

[choizeus02]

What is this PR for?

This pull request significantly revamps the 2. Spark Basic Features tutorial notebook. The goal is to modernize the content, improve accessibility for beginners, and ensure all examples are clear, practical, and produce meaningful visualizations on Zeppelin's default charts. It replaces outdated APIs and complex queries with clean, standard, and easy-to-understand examples that are more suitable for users new to Spark.

What type of PR is it?

What type of PR is it?
Improvement

Todos

• - improve tutorial notebook.

What is the Jira issue?

• ZEPPELIN-6224 Enhance Spark Basic Features tutorial notebook with more diverse and practical examples

How should this be tested?

• Strongly recommended: add automated unit tests for any new or changed behavior
• Outline any manual steps to test the PR here.

Screenshots (if appropriate)

Questions:

• Does the license files need to update? No
• Is there breaking changes for older versions? No
• Does this needs documentation? No

[ParkGyeongTae]

Could you please update the PR title to be a complete sentence? This helps provide clearer context when browsing the commit or PR history. Thanks!

[ParkGyeongTae]

Could you please fill out the "Questions" section in the PR template? It helps reviewers quickly understand whether there are any license updates, breaking changes, or documentation needs. Thanks!

[choizeus02]

ParkGyeongTae

Thanks for the review!