feat: add PDFMathTranslate converter for PDF translation with mathematical content

- Introduced PDFMathTranslate converter to handle PDF translations while preserving mathematical formulas.
- Updated Dockerfile to include necessary dependencies and pre-download models during build.
- Enhanced README.md to document the new converter and its features.
- Added tests for PDFMathTranslate to ensure correct functionality and error handling.

src/converters/main.ts

@@ -26,6 +26,7 @@ import { convert as convertVcf, properties as propertiesVcf } from "./vcf";
 import { convert as convertxelatex, properties as propertiesxelatex } from "./xelatex";
 import { convert as convertMarkitdown, properties as propertiesMarkitdown } from "./markitdown";
 import { convert as convertMineru, properties as propertiesMineru } from "./mineru";
+import { convert as convertPDFMathTranslate, properties as propertiesPDFMathTranslate } from "./pdfmathtranslate";
 
 // This should probably be reconstructed so that the functions are not imported instead the functions hook into this to make the converters more modular
 
@@ -142,6 +143,10 @@ const properties: Record<
     properties: propertiesMineru,
     converter: convertMineru,
   },
+  PDFMathTranslate: {
+    properties: propertiesPDFMathTranslate,
+    converter: convertPDFMathTranslate,
+  },
 };
 
 function chunks<T>(arr: T[], size: number): T[][] {