Change default dist folder to "browser"

[fmalcher]

With the new application builder (introduced in Angular 17), the build artifacts are placed in a "browser" subfolder. This is why we made the "dir" option for the deployment builder.
When using the application builder, it is mandatory to set "dir".

As soon as the application builder is the only officially supported builder (i.e. as soon as the Webpack-based builder is deprecated), we should change the default path so that the application builder works out of the box without "dir".

[JohannesHoppe]

If I remember correctly, this is only an issue for the standalone version. When using ng deploy the correct folder is chosen by default.