feat: add ComfyUI integration for image generation and management

- Implemented ComfyGenerateRequest type and associated functions for generating images using various architectures and modes.
- Added functions for listing generation options and handling image uploads.
- Created workflows for different generation modes including SDXL, Z-Image, Z-Image Turbo, and Anima.
- Introduced GenerationJobStatus component to display the status of ongoing generation jobs.
- Developed MaskControls for managing mask operations and displaying mask analysis.
- Created palette items for tool selection, layer management, and generation settings.

core/asset-provenance.ts

@@ -1,5 +1,5 @@
 import type { Rect, Size } from "./geometry";
-import type { AssetId, LayerId } from "./id";
+import type { AssetId, GenerationCandidateId, LayerId } from "./id";
 
 export type GeneratedAssetMode = "text-to-image" | "image-to-image" | "inpaint" | "outpaint";
 
@@ -7,7 +7,7 @@ export type GeneratedAssetAcceptance = "layer" | "replacement";
 
 export type AssetGenerationProvenance = {
   kind: "generated";
-  candidateId: string;
+  candidateId: GenerationCandidateId;
   mode: GeneratedAssetMode;
   acceptance: GeneratedAssetAcceptance;
   prompt: string;