Feat: Major CLI foundational improvements

[blainekasten]

Summary

This PR is a major rehaul of the CLI but unlocks a bunch of exciting new things. To end users, the changes should be nearly 100% opaque. I'll break this description up into a few chunks: What this previous issues are fixed from this, What is new because of this, and what's next.

What this previous issues are fixed from this

There were several thorns about Click that get fixed by switching to Cyclopts.

One of them was the awkward token parsing for the top level-shared parameters like --api-key. Previously you had to do it like together --api-key [command] [command-args], with this you can specify these at any part of the path.

Another was about the way click handled runtime. It operated each level as an independent stack so we had to wrap commands with decorators to do error handlers, and telemetry log handlers. In this new world, we can handle all of this at a single top level point, greatly simplifying.

What is new because of this

A bunch of new things are happening and most of it is around giving us finer control of all things from logic to aesthetics. Being built on top of rich we can use the theme to give common design to our application from the help pages to our internal print() calls.

Additionally we get a big performance boost in this in a few ways. First, Cyclopts is async so we can use the Async client and parallelize more work. Second, Cyclopts supports lazy loading commands. This means if you run together files list the files list code is loaded, but other modules aren't! This should improve the start time and memory overhead of using the CLI.

what's next

This PR is generally meant to switch the code over and give us a foundation to build upon. The foundation includes standing up some basic components/design library which we will build upon in the future. We will also be working to support more human experience improvements in the future around prompting parameters.

Testing Plan

• Integration and Unit Tests pass
• Output of each command has been verified and evidence pasted below
• Proper review from Team members

Output Evidence

together / together --help

endpoints

together endpoints / together endpoints --help

together endpoints availability-zones

together endpoints availability-zones --json

together endpoints create

together endpoints create --model Qwen/Qwen2.5-7B

together endpoints create --model Qwen/Qwen2.5-7B --hardware 2x_nvidia_h100_80gb_sxm

together endpoints create --model Qwen/Qwen2.5-7B --hardware 2x_nvidia_h100_80gb_sxm --json

together endpoints delete

together endpoints delete endpoint-26b0e2a7-e554-431d-849c-8dbb23b96506

together endpoints delete endpoint-26b0e2a7-e554-431d-849c-8dbb23b96506 --json