feat: add post_clone_script to dotfiles in order to support startup dependencies/coordination

[rowansmithau]

Description

Adds post_clone_script variable to the dotfiles module, enabling startup coordination with other scripts that depend on dotfiles.

An example of how to use this, which assumes the PR has been merged:

module "dotfiles" {
  count                = data.coder_workspace.me.start_count
  source               = "registry.coder.com/coder/dotfiles/coder"
  version              = "1.3.0"
  agent_id             = coder_agent.main.id
  default_dotfiles_uri = "https://github.com/someuser/somedotfiles"
  post_clone_script    = <<-EOF
    coder exp sync start dotfiles && coder exp sync complete dotfiles
  EOF
}

resource "coder_script" "personalize" {
  count        = data.coder_workspace.me.start_count
  agent_id     = coder_agent.main.id
  display_name = "Personalize"
  icon         = "/icon/personalize.svg"
  run_on_start = true
  script       = <<-EOF
    trap 'coder exp sync complete personalize' EXIT
    coder exp sync want personalize dotfiles
    coder exp sync start personalize
    SCRIPT="$HOME/.config/coderv2/dotfiles/personalize"
    if [ -f "$SCRIPT" ] && [ -x "$SCRIPT" ]; then
      $SCRIPT
    fi
  EOF
}

Type of Change

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

Module Information

Path: registry/coder/modules/dotfiles
New version: v1.3.0
Breaking change: [ ] Yes [x] No

Testing & Validation

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

Related Issues

#678

[github-actions]

Version Bump Required

One or more modules in this PR need their versions updated.

To fix this:

1. Run the version bump script locally:

   ./.github/scripts/version-bump.sh 

2. Commit the changes:

   git add . && git commit -m "chore: bump module versions ()"

3. Push your changes

The CI will automatically re-run once you push the updated versions.

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