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/workflow-introspection.md

@@ -0,0 +1,64 @@
+---
+title: List and Inspect Workflows
+impact: MEDIUM
+impactDescription: Enables monitoring and debugging of workflow executions
+tags: workflow, list, inspect, status, monitoring
+---
+
+## List and Inspect Workflows
+
+Use `dbos.ListWorkflows` to query workflow executions by status, name, time range, and other criteria.
+
+**Incorrect (no monitoring of workflow state):**
+
+```go
+// Start workflow with no way to check on it later
+dbos.RunWorkflow(ctx, processTask, "data")
+// If something goes wrong, no way to find or debug it
+```
+
+**Correct (listing and inspecting workflows):**
+
+```go
+// List workflows by status
+erroredWorkflows, err := dbos.ListWorkflows(ctx,
+	dbos.WithStatus([]dbos.WorkflowStatusType{dbos.WorkflowStatusError}),
+)
+
+for _, wf := range erroredWorkflows {
+	fmt.Printf("Workflow %s: %s - %v\n", wf.ID, wf.Name, wf.Error)
+}
+```
+
+List workflows with multiple filters:
+
+```go
+workflows, err := dbos.ListWorkflows(ctx,
+	dbos.WithName("processOrder"),
+	dbos.WithStatus([]dbos.WorkflowStatusType{dbos.WorkflowStatusSuccess}),
+	dbos.WithLimit(100),
+	dbos.WithSortDesc(),
+	dbos.WithLoadOutput(true),
+)
+```
+
+List workflow steps:
+
+```go
+steps, err := dbos.GetWorkflowSteps(ctx, workflowID)
+for _, step := range steps {
+	fmt.Printf("Step %d: %s\n", step.StepID, step.StepName)
+	if step.Error != nil {
+		fmt.Printf("  Error: %v\n", step.Error)
+	}
+	if step.ChildWorkflowID != "" {
+		fmt.Printf("  Child: %s\n", step.ChildWorkflowID)
+	}
+}
+```
+
+Workflow status values: `WorkflowStatusPending`, `WorkflowStatusEnqueued`, `WorkflowStatusSuccess`, `WorkflowStatusError`, `WorkflowStatusCancelled`, `WorkflowStatusMaxRecoveryAttemptsExceeded`
+
+To optimize performance, avoid loading inputs/outputs when you don't need them (they are not loaded by default).
+
+Reference: [Workflow Management](https://docs.dbos.dev/golang/tutorials/workflow-management#listing-workflows)