feat: add news-summarizer-agent using NewsAPI and ASI:One LLM

[vibeetroot]

Summary

Adds a new beginner-friendly news-summarizer-agent example that fetches the
top 5 news headlines for any topic using the free NewsAPI (no credit card
required) and summarizes them using ASI:One LLM. This fills the gap for a
beginner example combining real-time data fetching with LLM summarization.

Type of Change

• New agent example

Checklist

• I have starred this repository.
• I ran ruff check ..
• I ran ruff format ..
• I added/updated README.md for changed example(s).
• I added .env.example if environment variables are required.
• I added demo image/GIF (if applicable).

Related Issue

Closes #126

Notes for Reviewers

• Uses NewsAPI free tier (no credit card needed), making this accessible to
  all GSSoC contributors
• Uses ASI:One asi1-mini model via the standard chat completions endpoint
• Tested locally on Windows with Python 3.11 for topics: AI, sports, Finance
• No API keys committed — .env is gitignored, only .env.example included
• Code passes ruff check and ruff format with no issues

[vibeetroot]

Yes! Once the PR is created, leave a comment tagging the maintainer:

Hi @gautammanak1 I've added a news-summarizer-agent example as requested in #126. The agent fetches top 5 headlines using the free NewsAPI and summarizes them with ASI:One LLM. Tested locally on Windows with Python 3.11 — works for topics like AI, sports, and Finance. Please let me know if any changes are needed!