Implement EnumTool

[maximbircu]

Abstract

Sometimes, we want to limit the configuration value options the library user is able to select. This could be easily achieved by introducing an Enum tool, which will present a finite list of configuration values that could be selected for a parameter.

Requirements

Implement an Enum Tool which will help the library consumer limit the configuration values a parameter might take. It might be done in for of a radio group. The library consumer should have the ability to make the tool accept custom values though.

Consumer flow

1. Open the sample app and go to the YML dev tools screen.
2. Find the EnumTool UI control
3. Try to update the configuration value and make sure it's persisted after app restart.

Repeat the same use-case for Memory dev tools screen.