Installs dependencies for typescript and stylelint and
adds scripts to package.json for linting code. The linter
will ignore code in content/static for now. A new directory
to be added, content/lib, will contain the typescript and
unprocessed css files.
For golang/go#43358
Change-Id: I6ee74665a99af8938df6f1ee675c8705fcce589c
Reviewed-on: https://go-review.googlesource.com/c/pkgsite/+/280599
Reviewed-by: Jonathan Amsterdam <jba@google.com>
Reviewed-by: Julie Qiu <julie@golang.org>
Trust: Jamal Carvalho <jamal@golang.org>