[Feature request] Tag version

[andriy2]

Any way to 'tag' installed versions like install

Usage behavior:

nvm tag <version> [name]

nvm untag <version>

then any time to change version you don't have to remember version number but just type

nvm use <name>

[andriy2]

If you have two node versions - it's okay to just nvm list and find needed version, but if you have different projects, some on LTS, some on Latest, some on elder node versions - it would be comfortable to use use tags instead of versions

[coreybutler]

Duplicate of #478.