Fix: 177 Poseidon Enhancements

[uzairali19]

This pull request refactors the user model and repository logic to simplify user identity, improve role handling, and enhance data consistency. The most significant changes include removing the username field, standardizing organization roles to strings, normalizing email addresses, and reorganizing repository methods for clarity and maintainability.

User model and identity changes:

• Removed the username field from the User model and all related code, relying solely on email for user identity. [1] [2]

Data normalization and validation:

• Added normalization of email addresses to lowercase both on creation and update, and enforced this in repository methods and model lifecycle hooks. [1] [2] [3]

Repository API and logic improvements:

• Refactored repository methods to remove legacy logic (e.g., handling username, project_assignments, and multi-role lists), and grouped methods into clear "reads" and "writes" sections. [1] [2] [3]
• Improved error handling and link fetching for all user-related operations, ensuring returned users have fully populated relationships. [1] [2] [3] [4] [5]

Role and relationship handling:

• Updated methods for assigning/removing users from projects and updating organization roles to work with string or enum inputs, and to avoid duplicates or legacy issues. [1] [2] [3]

These changes streamline user management, improve reliability, and set the foundation for future enhancements.

[canelbirlik]

don't think we need to create a wrapper to just call these modern :D same with other components in forms/

[uzairali19]

I just took the current code we had and put them in separate components, I know these are empty wrappers. I'll remove them.