DOC: Add comparison with pdfplumber (#1837)

Author: RitchieP

docs/meta/comparisons.md

@@ -50,13 +50,17 @@ than PyPDF2. See [history of pypdf](history.md).
   [QPDF]: https://github.com/qpdf/qpdf
 
 
-## pdfminer
+## pdfminer.six and pdfplumber
 
 [`pdfminer.six`](https://pypi.org/project/pdfminer.six/) is capable of
 extracting the [font size](https://stackoverflow.com/a/69962459/562769)
 / font weight (bold-ness). It has no capabilities for writing PDF files.
 
-## pdfrw / pdfminer / pdfplumber
+[`pdfplumber`](https://pypi.org/project/pdfplumber/) is a library focused on extracting data from PDF documents. Since `pdfplumber` is built on top of `pdfminer.six`, there are **no capabilities of exporting or modifying a PDF file** (see [#440 (discussions)](https://github.com/jsvine/pdfplumber/discussions/440#discussioncomment-803880)). However, `pdfplumber` is capable of converting a PDF file into an image, [draw lines and rectangles on the image](https://github.com/jsvine/pdfplumber#drawing-methods), and save it as an image file.
+
+The `pdfplumber` community is active in answering questions and the library is maintained as of May 2023.
+
+## pdfrw / pdfrw2
 
 I don't have experience with any of those libraries. Please add a
 comparison if you know pypdf and [`pdfrw`](https://pypi.org/project/pdfrw/)!
@@ -66,8 +70,6 @@ Please be aware that there is also
 Then there is [`pdfrw2`](https://pypi.org/project/pdfrw2/) which doesn't have
 a large community behind it.
 
-And there is also [`pdfplumber`](https://pypi.org/project/pdfplumber/)
-
 ## Document Generation
 
 There are (Python) [tools to generate PDF documents](https://github.com/py-pdf/awesome-pdf#generators).