hotfix/BETA-2686and2757and2582and2685
- https://schluss.atlassian.net/browse/BETA-2686: Re-implemented the code changes and refactored.
- https://schluss.atlassian.net/browse/BETA-2757: Fixed ThemeData - accent properties deprecation and refactored.
- https://schluss.atlassian.net/browse/BETA-2582: Refactored the Main button and its uasge.
- https://schluss.atlassian.net/browse/BETA-2685: Upgraded qr_code_scanner, Gradle dependency, Gradle distribution and Kotlin version.