## Description
<!-- Briefly describe the purpose and scope of your changes -->
<!-- This is an auto-generated comment: release notes by coderabbit.ai
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## Summary by CodeRabbit
- **New Features**
- Introduced a real-time Steam login flow using QR codes and server-sent
events (SSE) for team creation and authentication.
- Added Steam account and friend management, including secure credential
storage and friend list synchronization.
- Integrated Steam login endpoints into the API, enabling QR code-based
login and automated team setup.
- **Improvements**
- Enhanced data security by implementing encrypted storage for sensitive
tokens.
- Updated database schema to support Steam accounts, teams, memberships,
and social connections.
- Refined type definitions and consolidated account-related information
for improved consistency.
- **Bug Fixes**
- Fixed trade ban status representation for Steam accounts.
- **Chores**
- Removed legacy C# Steam authentication service and related
configuration files.
- Updated and cleaned up package dependencies and development tooling.
- Streamlined type declaration files and resource definitions.
- **Style**
- Redesigned the team creation page UI with a modern, animated QR code
login interface.
- **Documentation**
- Updated OpenAPI documentation for new Steam login endpoints.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
