studyu_app-v2.8.0-dev.0

 - **REFACTOR**: rename core FitbitCredentials to FitbitAuthCredentials.

 - **REFACTOR**(fitbit): sleep data fetching logic.
 - **FIX**: default for app deployment flutter variables 2.
 - **FIX**: default for app deployment flutter variables.
 - **FIX**: auto formatting of localization files.
 - **FIX**: android config.
 - **FIX**: ios and android configuration.
 - **FIX**: localization.
 - **FIX**: proper onDone handling for fitbit_question_widget.dart.
 - **FIX**: update Fitbit integration and callback URLs.
 - **FIX**: passing taskId to fitbit_question_widget.dart.
 - **FIX**: current intervention text split.
 - **FEAT**: re-create android and ios folders gemfile"".
 - **FEAT**: re-create android and ios folders gemfile".
 - **FEAT**: re-create android and ios folders gemfile.
 - **FEAT**: re-create android and ios folders.
 - **FEAT**: update Fitbit credentials form and related dependencies.
 - **FEAT**: enhance Fitbit credential handling to include permission scopes.
 - **FEAT**: update Fitbit redirect URL and callback scheme.
 - **FEAT**: fetching remote subject with Fitbit credentials on onboarding.
 - **FEAT**: update Fitbit credentials form and AndroidManifest of app.
 - **FEAT**: fitbit_credentials table and integration.
 - **FEAT**: Add Fitbit credential deletion on study removal.
 - **FEAT**(fitbit): refactor _findLatestDataEntry function in fitbit_handler.dart.
 - **FEAT**: update Fitbit data handling and syncing process.
 - **FEAT**: add validation for Fitbit credentials in forms.
 - **FEAT**: add sleep data fetching.
 - **FEAT**(fitbit): update sleep data model and sleep fetch.
 - **FEAT**: sync Fitbit data on button press.
 - **FEAT**: add FitbitHandler.
 - **FEAT**: report overview.
 - **FEAT**: report overview.