syntax/git-rebase-todo.yaml: support more commands (#2495)
syntax/git-rebase-todo.yaml: support more commands (#2495)

For reference, see the list of supported commands in the help text of git's interactive rebase:
https://github.com/git/git/blob/v2.37.1/rebase-interactive.c#L43-L59
zyedidia/micro,zyedidia/micro