docs: restructure documentation into logical sections

docs/api/cli.md

@@ -151,7 +151,7 @@ The server exposes three routes:
 taskito scaler --app myapp:queue --port 9091 --target-queue-depth 5
 ```
 
-See the [KEDA Integration guide](../guide/keda.md) for Kubernetes deploy templates.
+See the [KEDA Integration guide](../guide/operations/keda.md) for Kubernetes deploy templates.
 
 ## Error Messages
 

docs/api/index.md

@@ -0,0 +1,13 @@
+# API Reference
+
+Complete Python API reference for all public classes and methods.
+
+| Class | Description |
+|-------|-------------|
+| [Queue](queue/index.md) | Central orchestrator — task registration, enqueue, workers, and all queue operations |
+| [TaskWrapper](task.md) | Handle returned by `@queue.task()` — `delay()`, `apply_async()`, `map()`, signatures |
+| [JobResult](result.md) | Handle for an enqueued job — status polling, result retrieval, dependencies |
+| [JobContext](context.md) | Runtime context inside a running task — job ID, retry count, progress updates |
+| [Canvas](canvas.md) | Workflow primitives — `Signature`, `chain`, `group`, `chord` |
+| [Testing](testing.md) | Test mode, `TestResult`, `MockResource` for unit testing tasks |
+| [CLI](cli.md) | `taskito` command-line interface — `worker`, `info`, `scaler` |