chore(pptx): add python-pptx dependency to project

- Included python-pptx in the dependencies and requirements in uv.lock.
- Cleaned up unused imports in the PPTX extractor's __init__.py file to streamline the module.

Author: maxpill

packages/ragbits-document-search/src/ragbits/document_search/ingestion/parsers/pptx/extractors/__init__.py

@@ -1,12 +1,3 @@
-from .dataclasses import (
-    ExtractedHyperlink,
-    ExtractedImage,
-    ExtractedMetadata,
-    ExtractedShape,
-    ExtractedSlideImage,
-    ExtractedSpeakerNotes,
-    ExtractedText,
-)
 from .extractors import (
     DEFAULT_EXTRACTORS,
     BaseExtractor,
@@ -21,13 +12,6 @@
 __all__ = [
     "DEFAULT_EXTRACTORS",
     "BaseExtractor",
-    "ExtractedHyperlink",
-    "ExtractedImage",
-    "ExtractedMetadata",
-    "ExtractedShape",
-    "ExtractedSlideImage",
-    "ExtractedSpeakerNotes",
-    "ExtractedText",
     "HyperlinkExtractor",
     "ImageExtractor",
     "MetadataExtractor",