FEAT: implement `git_friendly` flag for `YAMLSummary` callback #53

Job	Run time
lock / Check if PR already exists	0s
lock / Check PR description	3s
lock / Find lock files	0s
lock / Manifest.toml	0s
lock / pixi.lock	0s
lock / Determine Python versions	0s
lock / uv.lock	0s
lock / .pre-commit-config.yaml	0s
lock / pip constraint files	0s
lock / Push changes	0s
lock / Create PR	0s
	3s

Provide feedback