⭐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 -->

packages/core/src/credentials/credentials.sql.ts

@@ -0,0 +1,20 @@
+import { steamTable } from "../steam/steam.sql";
+import { pgTable, varchar } from "drizzle-orm/pg-core";
+import { encryptedText, timestamps, utc } from "../drizzle/types";
+
+export const steamCredentialsTable = pgTable(
+    "steam_account_credentials",
+    {
+        ...timestamps,
+        id: varchar("steam_id", { length: 255 })
+            .notNull()
+            .primaryKey()
+            .references(() => steamTable.id, {
+                onDelete: "cascade"
+            }),
+        refreshToken: encryptedText("refresh_token")
+            .notNull(),
+        expiry: utc("expiry").notNull(),
+        username: varchar("username", { length: 255 }).notNull(),
+    }
+)