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/queue-rate-limiting.md

@@ -0,0 +1,50 @@
+---
+title: Rate Limit Queue Execution
+impact: HIGH
+impactDescription: Prevents overwhelming external APIs with too many requests
+tags: queue, rate-limit, throttle, api
+---
+
+## Rate Limit Queue Execution
+
+Set rate limits on a queue to control how many workflows start in a given period. Rate limits are global across all DBOS processes.
+
+**Incorrect (no rate limiting):**
+
+```go
+queue := dbos.NewWorkflowQueue(ctx, "llm_tasks")
+// Could send hundreds of requests per second to a rate-limited API
+```
+
+**Correct (rate-limited queue):**
+
+```go
+queue := dbos.NewWorkflowQueue(ctx, "llm_tasks",
+	dbos.WithRateLimiter(&dbos.RateLimiter{
+		Limit:  50,
+		Period: 30 * time.Second,
+	}),
+)
+```
+
+This queue starts at most 50 workflows per 30 seconds.
+
+**Combining rate limiting with concurrency:**
+
+```go
+// At most 5 concurrent and 50 per 30 seconds
+queue := dbos.NewWorkflowQueue(ctx, "api_tasks",
+	dbos.WithWorkerConcurrency(5),
+	dbos.WithRateLimiter(&dbos.RateLimiter{
+		Limit:  50,
+		Period: 30 * time.Second,
+	}),
+)
+```
+
+Common use cases:
+- LLM API rate limiting (OpenAI, Anthropic, etc.)
+- Third-party API throttling
+- Preventing database overload
+
+Reference: [Rate Limiting](https://docs.dbos.dev/golang/tutorials/queue-tutorial#rate-limiting)