Add documentation for all PDF tools

docs/tools/pdf-to-svg.md

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+---
+title: PDF to SVG
+description: Convert PDF pages to scalable SVG vector graphics. Preserves text and shapes as vector paths for infinite scaling.
+---
+
+# PDF to SVG
+
+Converts each page of a PDF into an SVG (Scalable Vector Graphics) file. Unlike raster formats, SVG preserves vector paths, text, and shapes so the output scales to any size without pixelation. Powered by PyMuPDF.
+
+## How It Works
+
+1. Upload one or more PDFs by clicking the drop zone or dragging files onto it. You can add multiple files and manage them individually.
+2. Click **Convert** to process all uploaded files.
+3. Single-page, single-file conversions download as a standalone `.svg`. Everything else downloads as a ZIP archive.
+
+## Options
+
+This tool has no configurable options. Each page is converted to SVG using PyMuPDF's native vector export.
+
+## Output Format
+
+- **Single file, single page**: `filename.svg`
+- **Single file, multiple pages**: `filename_svg.zip` containing `page_1.svg`, `page_2.svg`, etc.
+- **Multiple files**: `pdf_to_svg.zip` with files organized by source document name.
+
+## Use Cases
+
+- Extracting vector diagrams, charts, or illustrations from PDF reports for use in web pages.
+- Editing PDF page content in a vector editor like Inkscape or Illustrator.
+- Embedding scalable page previews in responsive web applications.
+- Extracting logos or graphics from PDF brochures while preserving sharp edges.
+
+## Tips
+
+- SVG works best with PDFs that contain vector content. Scanned documents or image-heavy PDFs will produce large SVG files with embedded raster data.
+- For raster output of image-heavy PDFs, use [PDF to PNG](./pdf-to-png) or [PDF to JPG](./pdf-to-jpg) instead.
+- This tool supports batch conversion -- upload multiple PDFs at once to convert them all in a single run.
+
+## Related Tools
+
+- [PDF to PNG](./pdf-to-png)
+- [PDF to JPG](./pdf-to-jpg)
+- [PDF to Markdown](./pdf-to-markdown)