Since the API already disallows this, this pretty much just cleans up
the error reporting to the user.
Example of old error:
```
$ gh cs logs -c cwndrws-redacted
Starting codespace ⣽connecting to codespace: error starting codespace: HTTP 422: your codespace has an operation pending: updating to a sku with a different amount of storage; please wait until this operation is complete (https://api.github.com/user/codespaces/cwndrws-redacted/start)
exit status 1
```
Example of new error:
```
$ gh cs logs -c cwndrws-redacted
codespace is disabled while it has a pending operation: Changing machine types...
exit status 1
```
Since the API already disallows this, this makes the error cleaner and
more explicit when a user is trying to start/ssh into a codespace that
has a pending operation.
Example of the old error message:
```
$ gh cs ssh -c cwndrws-redacted
Starting codespace ⣽error connecting to codespace: error starting codespace: HTTP 422: your codespace has an operation pending: updating to a sku with a different amount of storage; please wait until this operation is complete (https://api.github.com/user/codespaces/cwndrws-redacted/start)
exit status 1
```
Example of the new error message:
```
$ gh cs ssh -c cwndrws-redacted
codespace is disabled while it has a pending operation: Changing machine types...
exit status 1
```
* Support setting Dependabot secrets
* lint: Remove unnecessary assignment
* Use `StringEnumFlag` helper for Application input
* Add Dependabot to command description
* Move repository name mapping after input validation
* Error when multiple secret entities are set
* Return an error for invalid apps
* Use `assert` instead of `require`
* after merge, switch to base branch if available
* Add ability to checkout new branch
* Style cleanup
Co-authored-by: Sam Coe <samcoe@users.noreply.github.com>
