Angular CLI: 21.1.0-next.1 Release

@schematics/angular

| Commit | Description | | -- | -- | | | generate detailed migration report for refactor-jasmine-vitest |

@angular/cli

| Commit | Description | | -- | -- | | | add signal forms lessons |

@angular-devkit/schematics

| Commit | Description | | -- | -- | | | remove lazy imports in node tasks |

@angular/build

| Commit | Description | | -- | -- | | | add filename truncation to test discovery | | | allow overriding Vitest coverage reportsDirectory option |