feat: add DBOS skills for TypeScript, Python, and Go (#94)

Add three DBOS SDK skills with reference documentation for building
reliable, fault-tolerant applications with durable workflows.

Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

skills/dbos-golang/references/comm-events.md

@@ -0,0 +1,69 @@
+---
+title: Use Events for Workflow Status Publishing
+impact: MEDIUM
+impactDescription: Enables real-time progress monitoring and interactive workflows
+tags: communication, events, status, key-value
+---
+
+## Use Events for Workflow Status Publishing
+
+Workflows can publish events (key-value pairs) with `dbos.SetEvent`. Other code can read events with `dbos.GetEvent`. Events are persisted and useful for real-time progress monitoring.
+
+**Incorrect (using external state for progress):**
+
+```go
+var progress int // Global variable - not durable!
+
+func processData(ctx dbos.DBOSContext, input string) (string, error) {
+	progress = 50 // Not persisted, lost on restart
+	return input, nil
+}
+```
+
+**Correct (using events):**
+
+```go
+func processData(ctx dbos.DBOSContext, input string) (string, error) {
+	dbos.SetEvent(ctx, "status", "processing")
+	_, err := dbos.RunAsStep(ctx, stepOne, dbos.WithStepName("stepOne"))
+	if err != nil {
+		return "", err
+	}
+	dbos.SetEvent(ctx, "progress", 50)
+	_, err = dbos.RunAsStep(ctx, stepTwo, dbos.WithStepName("stepTwo"))
+	if err != nil {
+		return "", err
+	}
+	dbos.SetEvent(ctx, "progress", 100)
+	dbos.SetEvent(ctx, "status", "complete")
+	return "done", nil
+}
+
+// Read events from outside the workflow
+status, err := dbos.GetEvent[string](ctx, workflowID, "status", 60*time.Second)
+progress, err := dbos.GetEvent[int](ctx, workflowID, "progress", 60*time.Second)
+```
+
+Events are useful for interactive workflows. For example, a checkout workflow can publish a payment URL for the caller to redirect to:
+
+```go
+func checkoutWorkflow(ctx dbos.DBOSContext, order Order) (string, error) {
+	paymentURL, err := dbos.RunAsStep(ctx, func(ctx context.Context) (string, error) {
+		return createPayment(order)
+	}, dbos.WithStepName("createPayment"))
+	if err != nil {
+		return "", err
+	}
+	dbos.SetEvent(ctx, "paymentURL", paymentURL)
+	// Continue processing...
+	return "success", nil
+}
+
+// HTTP handler starts workflow and reads the payment URL
+handle, _ := dbos.RunWorkflow(ctx, checkoutWorkflow, order)
+url, _ := dbos.GetEvent[string](ctx, handle.GetWorkflowID(), "paymentURL", 300*time.Second)
+```
+
+`GetEvent` blocks until the event is set or the timeout expires. It returns the zero value of the type if the timeout is reached.
+
+Reference: [Workflow Events](https://docs.dbos.dev/golang/tutorials/workflow-communication#workflow-events)