feat: add generation cancel job functionality and improve job handling

- Introduced `generationCancelJob` command ID in `commands/ids.ts`.
- Added `GenerationCancelJobPayload` type in `commands/payloads.ts`.
- Enhanced job status to include "cancelled" in `editor/state.ts`.
- Updated `runGenerationJob` to accept an `AbortSignal` and handle cancellation.
- Implemented cancellation logic in `runGenerate` and related functions.
- Added tests for job cancellation in `operations/generation/workflow.test.ts`.
- Improved layer rendering logic to prevent stack overflow in `editor/document-indexes.ts`.
- Added raster size assertions in `platform/browser/rasterLimits.ts` for image processing limits.
- Enhanced image file handling to check for size limits in `platform/browser/imageFiles.ts`.
- Updated UI components to reflect job cancellation state in `view/GenerationJobStatus.tsx` and `view/bottom-controls/GenerateActionControls.tsx`.

commands/payloads.ts

@@ -34,6 +34,7 @@ import type {
   GenerationStartJobPayload,
   GenerationSucceedJobPayload,
   GenerationFailJobPayload,
+  GenerationCancelJobPayload,
   GenerationSetResourcesPayload,
   GenerationFailResourcesPayload,
 } from "./generation";
@@ -106,6 +107,7 @@ export type CommandPayloads = {
   [commandIds.generationStartJob]: GenerationStartJobPayload;
   [commandIds.generationSucceedJob]: GenerationSucceedJobPayload;
   [commandIds.generationFailJob]: GenerationFailJobPayload;
+  [commandIds.generationCancelJob]: GenerationCancelJobPayload;
   [commandIds.generationLoadResources]: void;
   [commandIds.generationSetResources]: GenerationSetResourcesPayload;
   [commandIds.generationFailResources]: GenerationFailResourcesPayload;