feat: enhance layer mask handling and opacity management

- Introduced `getLayerMask` utility to streamline layer mask retrieval.
- Updated layer rendering logic to incorporate layer masks and opacity adjustments.
- Added functionality to prevent dropping a group into its descendants.
- Enhanced image texture rendering to support opacity parameters across various rendering functions.
- Implemented group layer bounds application for better scaling and positioning.
- Added tests to ensure correct behavior when handling layer masks and group layers.
- Created new types for asset generation provenance to track generated assets more effectively.

commands/index.ts

@@ -58,6 +58,7 @@ export {
   generationRemoveCandidateCommand,
   generationReplaceCandidatePixelsCommand,
   generationSelectCandidateCommand,
+  generationSetCompareModeCommand,
 } from "./generation";
 export type {
   GenerationAddCandidatePayload,
@@ -65,6 +66,7 @@ export type {
   GenerationRemoveCandidatePayload,
   GenerationReplaceCandidatePixelsPayload,
   GenerationSelectCandidatePayload,
+  GenerationSetCompareModePayload,
 } from "./generation";
 export type { CommandDispatcher, Dispatch } from "./dispatcher";
 export type { CommandId, CommandPayloads } from "./payloads";