Add PDF upload and access instructions (#151)

* Add PDF upload and access instructions

Added instructions for uploading PDF files to the stage folder and accessing them within the notebook.

* use pdfplumber

Author: lsingh4634426

notebooks/ingest-pdfs-with-pdfplumber/meta.toml

@@ -0,0 +1,10 @@
+[meta]
+authors=["singlestore"]
+title="Ask questions of your PDFs with PDFPlumber"
+description="Ask questions of your unstructured PDFs. In this notebook, PDFPlumber ingests pdfs, then Open AI is used to create embeddings, the vector data is stored in SingleStore and finally ask questions of your PDF data"
+icon="file-export"
+difficulty="beginner"
+tags=["ingest", "pdf","vector","pdfplumber"]
+lesson_areas=["AI", "Integrations"]
+destinations=["spaces"]
+minimum_tier="standard"