Added translation readme to Ukrainian

To cover issue #118 (Add internationalization and localization support to readme)
Closed issue #390 added to repo new file readme_uk.md
According to http://www.localeplanet.com/icu/uk-UA/index.html will be uk language code.

Requirements / Checklist

• Read the Contributing Guidelines
• Read or at least glanced at the FAQ
• Read or at least glanced at the Wiki
• Scripts execute without error (if necessary):
  • If any of the scripts were modified they have been tested and execute without error, e.g.:
    • ./font-patcher Inconsolata.otf --fontawesome --octicons --pomicons
    • ./gotta-patch-em-all-font-patcher\!.sh Hermit
• Extended the README and documentation if necessary, e.g. You added a new font please update the table

What does this Pull Request (PR) do?

added new file readme_uk.md with translation

How should this be manually tested?

Negative

Any background context you can provide?

Negative

What are the relevant tickets (if any)?

issue #390

Screenshots (if appropriate or helpful)

Negative