Add practice_files/ folder and README

Author: somacdivad

creating-modifying-pdf/README.md

@@ -0,0 +1,11 @@
+# Creating and Modifying PDFs With Python
+
+This folder contains resources and materials for Real Python [Creating and Modifying PDFs With Python](https://realpython.com/creating-modifying-pdf/) tutorial.
+
+There are two subfolders in this folder:
+
+1. **`practice_files/`:** Contains the sample PDFs used in the chapter
+2. **`source_code/`:** Contains source code from the chapter
+
+TODO:
+- [] Add source code files