Request: alphabetize the -h help output

[case]

I was looking for list and had to skim all the way to the bottom to find it. 😅

Happy to submit a PR, if this works for you all.

$ vt -h

Usage:   vt
Version: 0.1.48

Options:

  -h, --help     - Show this help.
  -V, --version  - Show the version number for this program.

Commands:

  profile, me                                         - Get information about the currently authenticated user (you!)
  upgrade                                             - Upgrade vt executable to latest or given version.
  clone        [valUri] [targetDir] [branchName]      - Clone a Val
  push                                                - Push local changes to a Val
  pull                                                - Pull the latest changes for the current Val
  status                                              - Show the working tree status
  branch                                              - List or delete branches
  checkout     <existingBranchName>                   - Check out a different branch
  watch                                               - Watch for changes and automatically sync with Val Town
  browse                                              - Open a Val's main page in a web browser
  create       <valName> [targetDir]                  - Create a new Val
  remix        <fromValUri> [newValName] [targetDir]  - Remix a Val
  config                                              - Manage vt configuration
  delete                                              - Delete the current Val
  list         [offset]                               - List all your Vals
  tail         [valUri] [branchName]                  - Stream logs of a Val

[stevekrouse]

Works for me! Thanks!!