Add sdk build (#17335)

## Summary

Adds `app:build` command as a one-shot version of `app:dev` - builds
manifest, functions, and front components once then exits (no watching).

**Changes:**
- Added `watch` option to `FunctionsWatcher` and
`FrontComponentsWatcher` to support both watch and one-shot modes
- Created `AppBuildCommand` reusing the same build logic as `app:dev`
with `watch: false`
- Added integration tests for `app:build` on both `rich-app` and
`root-app`
- Updated manifest types: `handlerPath` → `sourceHandlerPath` +
`builtHandlerPath`, `componentPath` → `sourceComponentPath` +
`builtComponentPath`
- Updated test app `package.json` scripts to match `create-twenty-app`
template

packages/twenty-server/src/engine/core-modules/application/application-sync.service.ts

@@ -947,7 +947,7 @@ export class ApplicationSyncService {
           name,
           code,
           timeoutSeconds: serverlessFunctionToSync.timeoutSeconds,
-          handlerPath: serverlessFunctionToSync.handlerPath,
+          handlerPath: serverlessFunctionToSync.sourceHandlerPath,
           handlerName: serverlessFunctionToSync.handlerName,
           toolInputSchema: serverlessFunctionToSync.toolInputSchema,
           isTool: serverlessFunctionToSync.isTool,
@@ -991,7 +991,7 @@ export class ApplicationSyncService {
         code,
         universalIdentifier: serverlessFunctionToCreate.universalIdentifier,
         timeoutSeconds: serverlessFunctionToCreate.timeoutSeconds,
-        handlerPath: serverlessFunctionToCreate.handlerPath,
+        handlerPath: serverlessFunctionToCreate.sourceHandlerPath,
         handlerName: serverlessFunctionToCreate.handlerName,
         applicationId,
         serverlessFunctionLayerId,