feat: update Python.gitignore to exclude PDF, CSV, and temporary files

Python.gitignore

@@ -36,6 +36,13 @@ MANIFEST
 pip-log.txt
 pip-delete-this-directory.txt
 
+# Generated documents / data exports
+*.pdf
+*.csv
+
+# Microsoft Office temporary files
+~$*
+
 # Unit test / coverage reports
 htmlcov/
 .tox/