Re: [PATCH 1/2] worktree: add CLI/config options for relative path linking

> This patch introduces the `--[no-]relative-paths` CLI option for
> `git worktree {add, move, repair}` commands, as well as the
> `worktree.useRelativePaths` configuration setting. When enabled,
> these options allow worktrees to be linked using relative paths,
> enhancing portability across environments where absolute paths
> may differ (e.g., containerized setups, shared network drives).
>
> Using the `--relative-paths` option with `worktree {move, repair}`
> will convert absolute paths to relative ones, while `--no-relative-paths`
> does the reverse. For cases where users want consistency in path
> handling, the config option `worktree.useRelativePaths` provides
> a persistent setting.
>
> A new helper function, `write_worktree_linking_files()`, centralizes
> the logic for computing and writing either relative or absolute
> paths, based on the provided configuration. This function accepts
> `strbuf` pointers to both the worktree’s `.git` link and the
> repository’s `gitdir`, and then writes the appropriate path to each.