Initializes Tolgee
apiKey is the Tolgee API key
apiUrl is the Tolgee API URL
If apiKey and apiUrl are not provided,
Tolgee will be initialized in static mode.
If apiKey and apiUrl are provided,
Tolgee will be initialized in remote mode.
In remote mode, translations will be fetched from Tolgee Cloud.
In static mode, translations will be fetched from local files.