[Request] Tag Input component

### Issue type

**I'm submitting a ...** (check one with "x")

* [ ] bug report
* [x] feature request

### Issue description

Hi, I would like to contribute to Tag Input component which can allow users to input tags. When 'Enter' is hit or the input lost focus, the value of the input becomes a tag. It supports:

- size
- shape and tag shape
- status and tag status
- disabled
- removable (true/false, tags can be removed or not)
- editable (true/false, tags can be edited or not)
- maxTags
- custom validators and asyncValidators
- tagAdded, tagUpdated, tagRemoved and textChanged output events
- auto complete

I've create pull request related to this. #2635