Expose PHP workflow history replayer

Issue: zorporation/durable-workflow#442

Loop-ID: build-02

Author: durable-workflow-ops

docs/api-stability.md

@@ -46,6 +46,7 @@ is either promoted to a `Contracts\*` interface or removed:
 - `Workflow\V2\Support\HistoryPayloadCompression`
 - `Workflow\V2\Support\OperatorQueueVisibility`
 - `Workflow\V2\Support\PayloadEnvelopeResolver`
+- `Workflow\V2\Support\ReplayState`
 - `Workflow\V2\Support\ScheduleManager`
 - `Workflow\V2\Support\ScheduleStartResult`
 - `Workflow\V2\Support\StructuralLimits`
@@ -54,6 +55,7 @@ is either promoted to a `Contracts\*` interface or removed:
 - `Workflow\V2\Support\WorkerCompatibilityFleet`
 - `Workflow\V2\Support\WorkerProtocolVersion`
 - `Workflow\V2\Support\WorkflowCommandNormalizer`
+- `Workflow\V2\Support\WorkflowReplayer`
 - `Workflow\V2\Support\WorkflowTaskOwnership`
 - `Workflow\V2\TaskWatchdog`
 

src/V2/Support/ReplayState.php

@@ -6,6 +6,9 @@
 
 use Workflow\V2\Workflow;
 
+/**
+ * @api Stable v2 replay outcome returned by WorkflowReplayer.
+ */
 final class ReplayState
 {
     public function __construct(