feat: fix-ci-automation-errors
- Fix release branch creation when branch already exists locally
- Replace IFS read syntax with portable cut commands for version parsing
- Handle existing release/next branch properly with checkout fallback
- Fix shell redirection syntax error in version increment job
Fixes CI pipeline failures:
- Job 'auto:merge-dev-to-release' exit code 128
- Job 'auto:version-increment' exit code 2