Refine todos

TODO.md

@@ -26,16 +26,6 @@ Things I want to do to make this library as good as it can be and a better, simp
 - [ ] Figure out if/how we support setting custom flag types e.g. implement `Value`. Try this out in an example, does it work with `Flaggable`, how do we make it work?
 - [x] How to handle conflicting flags e.g. `--version` has a short of `-v`, what if we want `-v` to mean verbosity, should be an error if there's a conflicting flag
 - [x] Make it easier to do ldflags with version info etc. Should support commit hash, version/tag number, build date
-- [ ] Output shell completion with a `--completion <shell>` flag, should be only available on the root command
-
-## Ideas
-
-Things that might be good but not committed to doing yet and/or haven't decided if they are worth it.
-
-- [ ] Wrap long description at a sensible limit
-- [ ] Named arguments e.g. `git clone REPO` could retrieve an arg by name and would be good for the help text
-- [ ] Make a CLI cli (lol) like cobra-cli to generate CLI apps?
-- [ ] Cleverly look at what `cli.Allow` is set to to dynamically render the usage info
 
 [clap]: https://github.com/clap-rs/clap
 [vhs]: https://github.com/charmbracelet/vhs