* Add prefix and suffix example

* Update doc

* Update packages/grafana-ui/src/components/Forms/Input/Input.mdx

Co-Authored-By: Dominik Prokop <dominik.prokop@grafana.com>

* Add light theme to be loaded for docs

* Add more docs

* Make Legacy stories internal

Co-authored-by: Dominik Prokop <dominik.prokop@grafana.com>