build: Ignore Python __pycache__ directories (#2935)

The `__pycache__` directory is automatically generated by the Python interpreter to store compiled bytecode (`.pyc` files).

These files are build artifacts specific to the local environment and should not be tracked in version control. This change adds a rule to `.gitignore` to exclude these directories, keeping the repository clean.

Author: liferoad

.gitignore

@@ -5,6 +5,7 @@
 
 # Python requirements build files
 **/__build__/**/*
+**/__pycache__/**/*
 
 # IntelliJ files
 **/.idea/**/*