Track Angular scripts build option

[davidlj95]

Several Angular CLI builders allow to specify a scripts option in its configuration. Those files will be included in the build and optionally added to index.html. Track them as production entries*.

* Though they may not be production entries! They'll probably be production entries if they are part of the build target.
Same happens for other configuration options. Like main, which can be specified in many build targets but also on non-production test target.
Options browser, ssr.entry or server could also be specified in other targets other than build and they won't probably be production entries. Opening another PR for that

[pkg-pr-new]

Open in Stackblitz

npm i https://pkg.pr.new/knip@886

commit: 1bbc899