feat: Implement terraform module with workspace and version (#644)

docs/config/README.md

@@ -103,6 +103,7 @@ prompt_order = [
     "python",
     "ruby",
     "rust",
+    "terraform",
     "nix_shell",
     "conda",
     "memory_usage",
@@ -989,6 +990,33 @@ The module will be shown if any of the following conditions are met:
 symbol = "⚙️ "
 ```
 
+## Terraform
+
+The `terraform` module shows the currently selected terraform workspace and version.
+By default the terraform version is not shown, since this is slow on current versions of terraform when a lot of plugins are in use.
+The module will be shown if any of the following conditions are met:
+
+- The current directory contains a `.terraform` folder
+- Current directory contains a file with the `.tf` extension
+
+### Options
+
+| Variable       | Default       | Description                                                 |
+| -------------- | ------------- | ----------------------------------------------------------- |
+| `symbol`       | `"💠 "`       | The symbol used before displaying the terraform workspace.  |
+| `style`        | `"bold 105"`  | The style for the module.                                   |
+| `disabled`     | `false`       | Disables the `terraform` module.                            |
+| `show_version` | `false`       | Shows the terraform version. Very slow on large workspaces. |
+
+### Example
+
+```toml
+# ~/.config/starship.toml
+
+[terraform]
+symbol = "🏎💨 "
+```
+
 ## Time
 
 The `time` module shows the current **local** time.