Add os specific, linting, and cache files to gitignore

Author: alozowski

.gitignore

@@ -14,3 +14,17 @@ env/
 # Project-specific
 src/reachy_mini_dashboard/installed_apps/*
 examples/debug/measures/*
+
+# macOS
+.DS_Store
+
+# Linux
+*~
+.directory
+.Trash-*
+.nfs*
+
+# Linting and formatting
+.ruff_cache/
+.mypy_cache/
+.pytest_cache/