Add .gitignore

# Python-related

venv

__pycache__

.ipynb_checkpoints

# JavaScript-related

node_modules

# Tests

.coverage

.pytest_cache

htmlcov

testresults.xml

cypress/videos

# PyCharm configuration

.idea

# VS Code configuration

*.code-workspace

# Local instance data and configuration

instance

# Environment files (might contain secrets)

.env

# weird macOS files (maximum compatibility)

.DS_Store

._.DS_Store

**/.DS_Store

**/._.DS_Store