feat(save-git-folder): add new command to save git refs to .gitmodules.csv and update help-table

task.template

@@ -44,6 +44,7 @@ help-table() {
     rows+=("log-success||Colored output for success.")
     rows+=("log-warning||Colored output for warnings.")
     rows+=("===Git===| | ")
+    rows+=("add-git-folder|[branch][url][path]|Add git folder to .gitmodules and .gitmodule.csv.")
     rows+=("aggregate-git-folders|[path]|Run gitaggregate for the repos.yaml.")
     rows+=("commit-git-folder|[message][path]|Commit all changes in git folders in path.")
     rows+=("clean-git-folder|[path]|Clean git folder.")