Enhance role-check system with stricter checks (#15392)

## Overview

This PR strengthens our permission system by introducing more granular
role-based access control across the platform.

## Changes

### New Permissions Added
- **Applications** - Control who can install and manage applications
- **Layouts** - Control who can customize page layouts and UI structure
- **AI** - Control access to AI features and agents
- **Upload File** - Separate permission for file uploads
- **Download File** - Separate permission for file downloads (frontend
visibility)

### Security Enhancements
- Implemented whitelist-based validation for workspace field updates
- Added explicit permission guards to core entity resolvers
- Enhanced ESLint rule to enforce permission checks on all mutations
- Created `CustomPermissionGuard` and `NoPermissionGuard` for better
code documentation

### Affected Components
- Core entity resolvers: webhooks, files, domains, applications,
layouts, postgres credentials
- Workspace update mutations now use whitelist validation
- Settings UI updated with new permission controls

### Developer Experience
- ESLint now catches missing permission guards during development
- Explicit guard markers make permission requirements clear in code
review
- Comprehensive test coverage for new permission logic

## Testing
- ✅ All TypeScript type checks pass
- ✅ ESLint validation passes
- ✅ New permission guards properly enforced
- ✅ Frontend UI displays new permissions correctly

## Migration Notes
Existing workspaces will need to assign the new permissions to roles as
needed. By default, all new permissions are set to `false` for non-admin
roles.

packages/twenty-server/src/engine/metadata-modules/route-trigger/route-trigger.module.ts

@@ -4,6 +4,7 @@ import { TypeOrmModule } from '@nestjs/typeorm';
 import { AuthModule } from 'src/engine/core-modules/auth/auth.module';
 import { WorkspaceDomainsModule } from 'src/engine/core-modules/domain/workspace-domains/workspace-domains.module';
 import { WorkspaceManyOrAllFlatEntityMapsCacheModule } from 'src/engine/metadata-modules/flat-entity/services/workspace-many-or-all-flat-entity-maps-cache.module';
+import { PermissionsModule } from 'src/engine/metadata-modules/permissions/permissions.module';
 import { RouteTriggerResolver } from 'src/engine/metadata-modules/route-trigger/resolvers/route-trigger.resolver';
 import { RouteTriggerController } from 'src/engine/metadata-modules/route-trigger/route-trigger.controller';
 import { RouteTriggerEntity } from 'src/engine/metadata-modules/route-trigger/route-trigger.entity';
@@ -20,6 +21,7 @@ import { WorkspaceMigrationV2Module } from 'src/engine/workspace-manager/workspa
     WorkspaceDomainsModule,
     ServerlessFunctionModule,
     WorkspaceManyOrAllFlatEntityMapsCacheModule,
+    PermissionsModule,
     WorkspaceMigrationV2Module,
   ],
   controllers: [RouteTriggerController],