UI: Investigate how implemented in the UI feature-toggles

** Purpose**
- Review the information o changes made of Juan Gabriel to add support to feature Toggles
- Review the existing configs in Azure to feature toggle.
- Review how implement in the UI.

** Purpose**
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**Design link**
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**Criteria of acceptance**
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**Note**
- [Options feature toggle in Azure](https://portal.azure.com/#@azureioet.onmicrosoft.com/resource/subscriptions/ca70c44c-ad7a-4333-a22c-07ebc6a69224/resourceGroups/eys-training-api/providers/Microsoft.AppConfiguration/configurationStores/time-tracker-config/ff)

- [Teoría](https://martinfowler.com/articles/feature-toggles.html)
- [Como vamos a usar FT para lanzar - features a ciertos usuarios o grupo de usuarios](https://github.com/ioet/time-tracker-ui/wiki/Adding-support-for-Feature-Toggles)
- [ Implementacion para la lectura de FT desde el UI](https://github.com/ioet/time-tracker-ui/pull/541)