feat: add a tree view for commands

[RodEsp]

What does this PR do?

Adds the --tree flag to the commands command.
This will print out a tree like structure for all of the commands in a CLI.

Testing instructions

1. Pull this branch
2. Run yarn install and yarn build
3. At the root of this repo run
   1. Using the sf cli:
      1. sf plugins link .
      2. sf commands --tree
   2. Using the sfdx cli:
      1. sfdx plugins:link .
      2. sfdx commands --tree
4. Verify the command tree.

Examples

Normal tree

--json tree

@W-10673592@