Allow a template author to define a devcontainer as part of acoder_agent resource (or even as part of a separatecoder_agent_devcontainer resource):

resource "coder_agent" "main" {  [...]  devcontainer {    workspace_folder = "$${HOME}/src/devcontainer_repo" # Required    config = ".devcontainer/devcontainer.json" # optional, default    # additional options TBD  }}

Expose agent API endpoints to start and stop the devcontainer using@devcontainers/cli e.g. the agent will simply run

cd $DEVCONTAINER_DIR && devcontainer up --workspace-folder .

Wire these up tocoderd endpoints to trigger the start and stop.

For now, only support Docker via@devcontainers/cli.

This will require supporting work from the Terraform provider.

TODO: should this part of thecoder_agent schema, or a separate data source entirely?