⭐feat: Add Steam account linking with team creation (#274)

## Description
<!-- Briefly describe the purpose and scope of your changes -->


<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## 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 -->

infra/postgres.ts

@@ -1,5 +1,6 @@
 import { vpc } from "./vpc";
 import { isPermanentStage } from "./stage";
+import { steamEncryptionKey } from "./secret";
 
 // TODO: Add a dev db to use, this will help with running zero locally... and testing it
 export const postgres = new sst.aws.Aurora("Database", {
@@ -41,7 +42,7 @@ export const postgres = new sst.aws.Aurora("Database", {
 
 
 new sst.x.DevCommand("Studio", {
-  link: [postgres],
+  link: [postgres, steamEncryptionKey],
   dev: {
     command: "bun db:dev studio",
     directory: "packages/core",