feat: script for scientific publications

[Aakashv6]

Issue #1192, if available:

Description of changes:

• Added bin/braketpaper_update.py to query arXiv for papers mentioning "Amazon Braket" over the past 12 months
• Updates the README.md with a markdown table (year, month, title, authors, arXiv link)
• Uses only Python standard library (requests, feedparser)
• Idempotent via HTML comment markers (safe to re-run)

Testing done:

• Script runs without errors and prints paper count
• Verified README.md contains the publications table at the end of the file
• Attached the generated table image below

Testing done:

Merge Checklist

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