Add checksum to manifest (#17368)

## Refactor app-dev state management and build utilities

- Store only `manifest` in `AppDevState` instead of full
`ManifestBuildResult`; add `sourcePath` to `FileStatus`
- Pass `sourcePaths` directly to watchers instead of
`ManifestBuildResult`
- Only reset `fileUploadStatus` for functions/components when their
source paths change
- Add pure `updateManifestChecksum` utility that returns a new manifest
without side effects
- Extract `processEsbuildResult` to deduplicate build result processing
between watchers
- Rename `serverlessFunctions` → `functions` in SDK code (API unchanged)
- Extract `writeManifestToOutput` to shared `manifest-writer.ts`

packages/twenty-sdk/src/application/front-components/front-component-config.ts

@@ -4,7 +4,7 @@ export type FrontComponentType = React.ComponentType<any>;
 
 export type FrontComponentConfig = Omit<
   FrontComponentManifest,
-  'sourceComponentPath' | 'builtComponentPath' | 'componentName'
+  'sourceComponentPath' | 'builtComponentPath' | 'builtComponentChecksum' | 'componentName'
 > & {
   name?: string;
   description?: string;