feat: add homebrew Formula

[ellie]

I had some issues with my local python env, so built a homebrew formula.

In general, homebrew allows installation of packages from GitHub with the following format

brew install <username>/<repo>

However, this requires that we have a repo named github.com/agentops-ai/homebrew-agentstack, with the contents of this PR.

If we want to keep it all in the same repo, users can run the following instead

brew tap agentops-ai/agentstack https://github.com/agentops-ai/agentstack
brew install agentops-ai/agentstack/agentstack

In order for this to work, we need to ensure that every dep from the lockfile is codified in the formula, and that the url + shasum are kept up to date for each release.

In the formula, you'll see "url" and "shasum". Those will need updating per release. You'll also need to change the list of resources if anything changes with your deps.

This is pretty annoying, but luckily there's some tooling!

I used "poet" to generate a bunch of this, though it needed some manual tweaking - https://github.com/tdsmith/homebrew-pypi-poet

Also, note this line in the install function

ENV.append_to_cflags '-Wno-incompatible-function-pointer-types' if DevelopmentTools.clang_build_version >= 1500

There's currently an issue with the later versions of Xcode, while building the YAML package used here

Upstream ref: https://sourceforge.net/p/ruamel-yaml-clib/tickets/32/

[ellie]

brew tap agentops-ai/agentstack https://github.com/agentops-ai/agentstack
brew install agentops-ai/agentstack/agentstack

$ agentstack
usage: agentstack [-h] [-v] {docs,quickstart,init,i,generate,g,tools,t} ...

AgentStack CLI - The easiest way to build an agent application

positional arguments:
  {docs,quickstart,init,i,generate,g,tools,t}
                        Available commands
    docs                Open Agentstack docs
    quickstart          Open the quickstart guide
    init (i)            Initialize a directory for the project
    generate (g)        Generate agents or tasks
    tools (t)           Manage tools

options:
  -h, --help            show this help message and exit
  -v, --version         Show the version

it works 🥳