Update ngx-file-drop to Angular 19

[apiweb]

This PR update the ngx-file-drop project from Angular 16 to Angular 19. The upgrade was performed using ng update, after this, I ran some schematics to ensure compatibility.

Changes:

• Updated Angular dependencies to version 19.
• Ran ng update and applied necessary schematics for the migration.
• Updated project files (angular.json, tsconfig.json, etc.) to align with the latest Angular structure and options.
• Updated code to use Angular’s new control flow from v17.
• I mark all components with standalone: false to maintain the module-based structure. (In a future PR i can migrate the project to full standalone components).
• Update @Input and @Output to use the new signals input and output signals.
• Updated example application with some more examples.
• Updated Lint to use the new eslint.
• Added rimraf as devdependency because it was removed from eslint 9.0.

Notes

• Tested on a local project with no apparent issues.