base-bash-libs v1.0.0

Added

• Added lib/bash/str/lib_str.sh with string case, trim, predicate, split, join, and membership helpers.
• Added a documented stdlib-loaded marker for companion-library dependency guards.
• Added stdlib cleanup hook and cleanup path registration backed by a shared EXIT trap.
• Added portable stdlib temporary file and directory helpers with default exit cleanup.
• Added stdlib command path and function introspection helpers.
• Added std_run_with_timeout for bounded command execution with macOS/Linux fallback behavior.

Fixed

• Made the Tests workflow run on main pushes after the default-branch migration.