Add batch processing tip for PDF files

[Ashish1896]

Added a tip for batch processing PDF files using a shell loop.

[coderabbitai]

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ℹ️ Review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: 03c5c08a-eddd-4710-8215-044ccd4b84e6

📥 Commits

Reviewing files that changed from the base of the PR and between 63cbbd9 and 1beeff3.

📒 Files selected for processing (1)

• README.md

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch Ashish1896-patch-1

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