* fix(transformer): find last modified date form commit on submodule
when the content folder has a submodule git, the relative path start in content folder and not root folder of quartz
* fix(transformer): use path.relative for improved path handling in last modified date calculation
* fix(transformer): keep find file from relative path of repo workdir
* fix(transformer): use variable for repository workdir
use default value if repo.workdir is undefined to user fullFp value
When providing an absolute path to the content directory (e.g. when using an Obsidian Vault in another directory), the build step would fail with
Failed to process `/absolute/path/to/file.md`: ENOENT: no such file or directory, stat '/current/working/directory/absolute/path/'
This problem originated in the `CreatedModifiedDate` transformer which tries to construct a native filesystem path to the file to call `fs.stat` on. It did not however, account for the original file path contained in the received `VFile` being an absolute path and so, just concatenated the current working directory with the absolute path producing a nonexistent one.
This patch adds a simple fix for this issue by checking if the original file path is already absolute before concatenating with the current working directory.
