feat(bash/bashrc): add an alias to list locally installed npm packages
feat(bash/bashrc): add an alias to list locally installed npm packages

- add an alias to list locally installed npm packages
- rename the alias to list globally installed npm packages:
  - `npm-pkg-versions` -> `npm-gpkg-versions`
- add a comment line to explain briefly what these aliases are

shoichiaizawa/dotfiles,shoichiaizawa/dotfiles,shoichiaizawa/dotfiles