docs(sdk): add basic workflow example

daprdocs/content/en/go-sdk-docs/go-client/_index.md

@@ -88,6 +88,91 @@ resp, err = client.InvokeMethodWithContent(ctx, "app-id", "method-name", "post",
 
 For a full guide on service invocation, visit [How-To: Invoke a service]({{< ref howto-invoke-discover-services.md >}}).
 
+### Workflows
+
+Workflows and their activities can be authored and managed using the Dapr Go SDK like so:
+
+```go
+import (
+...
+"github.com/dapr/go-sdk/workflow"
+...
+)
+
+func ExampleWorkflow(ctx *workflow.WorkflowContext) (any, error) {
+    var output string
+    input := "world"
+
+    if err := ctx.CallActivity(ExampleActivity, workflow.ActivityInput(input)).Await(&output); err != nil {
+        return nil, err
+    }
+
+    // Print output - "hello world"
+    fmt.Println(output)
+
+    return nil, nil
+}
+
+func ExampleActivity(ctx workflow.ActivityContext) (any, error) {
+    var input int
+    if err := ctx.GetInput(&input); err != nil {
+        return "", err
+    }
+
+    return fmt.Sprintf("hello %s", input), nil
+}
+
+func main() {
+    // Create a workflow worker
+    w, err := workflow.NewWorker()
+    if err != nil {
+        log.Fatalf("error creating worker: %v", err)
+    }
+
+    // Register the workflow
+    w.RegisterWorkflow(ExampleWorkflow)
+
+    // Register the activity
+    w.RegisterActivity(ExampleActivity)
+
+    // Start workflow runner
+    if err := w.Start(); err != nil {
+        log.Fatal(err)
+    }
+
+    // Create a workflow client
+    wfClient, err := workflow.NewClient()
+    if err != nil {
+        log.Fatal(err)
+    }
+
+    // Start a new workflow
+    id, err := wfClient.ScheduleNewWorkflow(context.Background(), "ExampleWorkflow")
+    if err != nil {
+        log.Fatal(err)
+    }
+
+    // Wait for the workflow to complete
+    metadata, err := wfClient.WaitForWorkflowCompletion(ctx, id)
+    if err != nil {
+        log.Fatal(err)
+    }
+
+    // Print workflow status post-completion
+    fmt.Println(metadata.RuntimeStatus)
+
+    // Shutdown Worker
+    w.Shutdown()
+}
+```
+
+- For a more comprehensive guide on workflows visit these How-To guides:
+  - [How-To: Author a workflow]({{< ref howto-author-workflow.md >}}).
+  - [How-To: Manage a workflow]({{< ref howto-manage-workflow.md >}}).
+- Visit the Go SDK Examples to jump into complete examples:
+  - [Workflow Example](https://github.com/dapr/go-sdk/tree/main/examples/workflow)
+  - [Workflow - Parallelised](https://github.com/dapr/go-sdk/tree/main/examples/workflow-parallel)
+
 ### State Management
 
 For simple use-cases, Dapr client provides easy to use `Save`, `Get`, `Delete` methods: