Provide applicatiion assets (#18973)

- improve backend
- improve frontend

<img width="1293" height="824" alt="image"
src="https://github.com/user-attachments/assets/7a4633f1-85cd-4126-b058-dbeae6ba2218"
/>

packages/twenty-sdk/src/cli/utilities/dev/orchestrator/steps/register-app-orchestrator-step.ts

@@ -70,7 +70,6 @@ export class RegisterAppOrchestratorStep {
 
     const createResult = await this.apiService.createApplicationRegistration({
       name: input.manifest.application.displayName,
-      description: input.manifest.application.description,
       universalIdentifier,
     });