build: ensure ng-dev command works on windows
build: ensure ng-dev command works on windows

Apparently the `ng-dev` command does not work with Git Bash on windows
because of the environment variable being set. We should use `ts-node`
directly to avoid this issue, and also avoid the `$PWD` access which
might not work depending on the shell.

Also on the dev-infra side we would need to remove the ts-node shebang
and leave the responsibility to the consumer project.

clydin/angular-cli,angular/angular-cli,angular/angular-cli,angular/angular-cli,angular/angular-cli,clydin/angular-cli,clydin/angular-cli,clydin/angular-cli