Added Czech localization files

[morning4coffe-dev]

Pull request type

Please check the type of change your PR introduces:

• Bugfix
• Feature
• Code style update (formatting, renaming)
• Refactoring (no functional changes, no api changes)
• Build related changes
• Documentation content changes
• Internationalization and localization
• Other (please describe):

What is the current behavior?

• DevToys does not have Czech localization

What is the new behavior?

• DevToys now has Czech localization

Other information

DevToys in Czech

If there are any string changes, you can contact me any time on Twitter or Discord (@morning4coffe).

Quality check

Before creating this PR, have you:

• Followed the code style guideline as described in CONTRIBUTING.md
• Verified that the change work in Release build configuration
• Checked all unit tests pass

[veler]

Hi,
Thank you so much for adding this translation, that's super cool! :D
The language will be released in the next update (likely today or tomorrow)
Thank you again!