chore: remove stray Python bytecode and ignore it

A bytecode cache from running the script tests was committed by accident
in the spelling cleanup; nothing ignored it.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

.gitignore

@@ -225,3 +225,6 @@ OpenNest.Tests/test-config.json
 # Vendor programming manuals: keep reference copies outside source control.
 CINCINNATI LASER PROGRAMMING MANUAL.pdf
 TF5200_programming_manual_en.pdf
+
+# Python bytecode
+__pycache__/