Add Pnpm as project type for config

[ ] All tests passed. If this feature is not already covered by the tests, I added new tests.
[ ] All static analysis checks passed.
[ ] This pull request is on the dev branch.
[ ] I used gofmt for formatting the code before submitting the pull request.

Add pnpm as a new type to allow option to add config file for this package-manager

jfrog / jfrog-cli-core