feat: add open-webui module

[mtojek]

Description

Open WebUI is a user-friendly web interface for interacting with Large Language Models. It provides a ChatGPT-like interface that can connect to various LLM providers including OpenAI, Ollama, and more.

This module installs and runs Open WebUI using Python and pip within your Coder workspace.

Type of Change

• New module
• New template
• Bug fix
• Feature/enhancement
• Documentation
• Other

Module Information

Path: registry/coder-labs/modules/open-webui
New version: v0.9.0

Testing & Validation

• Tests pass (bun test)
• Code formatted (bun fmt)
• Changes tested locally

Local testing

module "open-webui" {
  count    = data.coder_workspace.me.start_count
  source   = "git::https://github.com/coder/registry.git//registry/coder-labs/modules/open-webui?ref=open-webui-module"
  
  http_server_log_path = "/tmp/open-webui.log"
  http_server_port = 7800
  data_dir = "/home/coder/.open-webui"
  openai_api_key = "sk-proj-..."

  agent_id = coder_agent.main.id
}

[DevelopmentCats]

@mtojek I left some comments, and kicked off the copilot review.

I will give this a test when I get a chance and will report back.

[Copilot]

Copilot encountered an error and was unable to review this pull request. You can try again by re-requesting a review.