At the moment, the "help footer" doesn't add any new information, but if
additional flags are added later, they should appear in the footer. This
change restores this help footer:
```shell
USAGE
gh actions [flags]
INHERITED FLAGS
--help Show help for command
LEARN MORE
Use 'gh <command> <subcommand> --help' for more information about a command.
Read the manual at https://cli.github.com/manual
```
* Implement first round of support for GitHub Actions
This commit adds:
gh actions
gh run list
gh run view
gh job view
as part of our first round of actions support. These commands are
unlisted and considered in beta.
* review feedback
* tests for exit status on job view
* spinner tracks io itself
* review feedback
* fix PR matching
* enable pager for job log viewing
* add more colorf functions
* add AnnotationSymbol
* hide job, run
* do not add method to api.Client
* remove useless cargo coded copypasta