[Feature] OCR PDF

[ayushcmd]

Summary

Make scanned/image-based PDFs searchable and selectable.

Files to create/edit

• src/pages/tools/OcrPdf.tsx → create
• src/App.tsx → add import + route /tools/ocr-pdf
• src/pages/Tools.tsx → add to allTools[]

Implementation notes

• Use tesseract.js (runs fully in browser, no server)
• Render each page via pdfjs-dist canvas then run OCR
• Output: downloadable plain text or searchable PDF

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