Implement '__enter__' in PdfReader

[KevFlo]

Explanation

Make PdfReader more pythonic by using the 'with' 'as' context.

Code Example

from PyPDF2 import PdfReader
total_text = ""

pdf_file_path = "example/path" # Replace with your PDF file path
with PdfReader(pdf_file_path) as reader:
    total_text = '\n\n'.join([page.extract_text() for page in reader.pages])

Error trace back

Traceback (most recent call last):
File "pdfotxt.py", line 21, in
with PdfReader(pdf_file_path) as reader:
AttributeError: enter

[pubpub-zz]

PyPDF2 is obsolete. Feature should be available in pypdf

[KevFlo]

Just installed and re-ran code with pypdf,
I get the same error as with PyPDF2.

Traceback (most recent call last):
  File "pdfotxt.py", line 22, in <module>
    with PdfReader(pdf_file_path) as reader:
AttributeError: __enter__ 

[pubpub-zz]

Can you propose a PR?