FEAT: Add binary_path data type

[jsong468]

Description

Adds a new binary_path data type to represent arbitrary binary data stored in blob or disk storage, particularly useful for XPIA attacks where targets may not support specific file types.

• Added binary_path to PromptDataType Literal in literals.py
• Created BlobPathDataTypeSerializer class in data_type_serializer.py where data_on_disk()=True, uses /binaries subdirectory, default extension .bin
• Updated data_serializer_factory to route binary_path to the new serializer
• Updated PDFConverter to output binary_path instead of url which was semantically incorrect.

Minor change:

• content is no longer passed as an arg to value in data_serializer_factory in PDF converter. This was misleading since value should be a file path and was overriden in save_data method call in the next line anyways.

Tests and Documentation

Tests added/updated:

• Added 6 new tests in test_data_type_serializer.py:
• Updated test_literals.py to include binary_path in expected literals
• Updated test_pdf_converter.py to expect binary_path output type instead of url
• Updated test_prompt_converter.py to ensure correct expected_output_type

Notebook:

• Re-ran 5_file_converters.ipynb notebook

[hannahwestra25]

"content is no longer passed as an arg to value in data_serializer_factory. This was misleading since value should be a file path and was overriden in save_data method call in the next line anyways."
This is not in this PR right ? or am I missing something ?

[jsong468]

"content is no longer passed as an arg to value in data_serializer_factory. This was misleading since value should be a file path and was overriden in save_data method call in the next line anyways." This is not in this PR right ? or am I missing something ?

Line 412 of pdf_converter.py :) @hannahwestra25