absorbgitdirs::
If a git directory of a submodule is inside the submodule,
- move the git directory of the submodule into its superprojects
+ move the git directory of the submodule into its superproject's
`$GIT_DIR/modules` path and then connect the git directory and
its working directory by setting the `core.worktree` and adding
a .git file pointing to the git directory embedded in the