This PR adds a /branch command with the following spec:
`/branch switch <name>` - switch to the specified branch, only if it exists.
`/branch get` - get the name of the current branch.
With the addition of these two commands, it will greatly speed up the development and testing process.
Other Changes:
- Removed git_dev status
- /book now displays the uploaded image on all prompts
- added a private option to /book to keep confirmation emails from being shared if desired
- now runs `git fetch` before gathering git info when running /info
Reviewed-on: #1
