...n `ng new`
Introduces the ability to configure the file naming convention for generated files directly within the `ng new` schematic. This allows users to create new workspaces that adhere to the 2016 style guide conventions, as an alternative to the default 2025 style guide. For more information, see the Angular Style Guide (https://angular.dev/style-guide).
When a user runs `ng new --file-name-style-guide 2016`:
- The `ng-new` schematic passes the style guide option down to the `application` sub-schematic.
- The `application` schematic configures the `schematics` section of the new `angular.json` to use the 2016 naming conventions for future `ng generate` commands.
- The `application` schematic generates the initial application files with the appropriate suffixes (e.g., `app.component.ts`).
This addresses community feedback requesting a way to maintain the previous file naming structure for consistency in existing projects and workflows.
Fixes angular#30594 

...t schematics
Introduces a new `addTypeToClassName` option to the `component`, `directive`, and `service` schematics. This option controls whether the schematic's `type` (e.g., 'Component', 'Directive', 'Service') is appended to the generated class name.
When `fileNameStyleGuide` is set to `'2016'` in `ng new`, `addTypeToClassName` is automatically set to `false` for these schematics in `angular.json`. This ensures that while file names follow the 2016 style (e.g., `app.component.ts`), class names remain concise (e.g., `AppComponent` instead of `AppComponentComponent`), aligning with future selectorless template conventions.
This change provides greater flexibility in naming conventions, allowing users to choose between more verbose class names (default for 2025 style guide) and more concise ones (for 2016 style guide).