chore: update dependencies and refactor the code

[Bulent Baris Kilic]

Update dependencies and refactor the code:

• analysis_options: 3.1.0 -> 4.0.0+1
• bloc: 8.1.0 -> 8.1.1
• bloc_test: 9.1.0 -> 9.1.1
• flutter_bloc: 8.1.1 -> 8.1.2
• flame_audio: 1.3.5 -> 1.4.0
• freezed: 2.1.0+1 -> 2.3.2
• refactor the code based on the dependency changes