fixed app startup bugs fixes#75

[xkaper001]

Closes #75

📝 Description

Fixes all the bugs mentioned in #75

• Two splash screens reference in the app (causes breaking).
• main.dart has two refernces of splash screen which fails the build.
• the pubspec.yaml file doesn't contain flutter_dotenv but the app uses this package.
• intl package dependency issues.
• multiple session folders in lib/presentation
• multiple widgets folders in lib/presentation
• splash_screen.dart missed a }, failing the build

🔧 Changes Made

Import Reorganization:

• Consolidated and cleaned up import statements in therapist/lib/main.dart to improve readability and maintainability.
• Adjusted import paths for widget files in therapist/lib/presentation/auth/auth_screen.dart, therapist/lib/presentation/home/home_screen.dart, therapist/lib/presentation/profile/profile_screen.dart, and therapist/lib/presentation/session/session_screen.dart to use the widgets subdirectory. [1] [2] [3] [4]

File Deletions:

• Removed the therapist/lib/presentation/sessions/sessions_screen.dart file as it was no longer needed.
• Deleted the therapist/lib/presentation/widget/splash_screen.dart file and its associated code.

Dependency Updates:

• Updated the intl dependency version from ^0.17.0 to ^0.19.0 in therapist/pubspec.yaml.

✅ Checklist

• I have read the contributing guidelines.
• I have added tests that prove my fix is effective or that my feature works.
• I have added necessary documentation (if applicable).
• Any dependent changes have been merged and published in downstream modules.

[mdmohsin7]

lgtm