feat: add marimo module

[cdr-robot]

Add marimo module

This PR adds a new terraform module for marimo - a reactive Python notebook that's reproducible, git-friendly, and deployable as scripts or apps.

Features

• Installs marimo with recommended dependencies using either pipx or uv
• Configurable port, log path, sharing options
• Support for subdomain or path-based access
• Automatic startup via coder_script resource
• Integration with Coder UI via coder_app resource
• Custom marimo icon

Usage

module "marimo" {
  count    = data.coder_workspace.me.start_count
  source   = "registry.coder.com/modules/marimo/coder"
  version  = "1.0.0"
  agent_id = coder_agent.example.id
}

Testing

Basic tests are implemented following the pattern from the jupyterlab module.

[matifali]

We are moving to https://github.com/coder/regitsry. Please move your PR there. Thanks
More context in #469