feat: add admin guard and JWT role support

- Create AdminGuard to check user role
- Update JWT strategy to include role in payload
- Update auth service to include role in token generation
- Prepare admin module structure
- TypeScript will resolve lint errors after server restart

apps/api/dist/auth/jwt.strategy.d.ts

@@ -2,10 +2,11 @@ import { Strategy } from 'passport-jwt';
 export interface JwtPayload {
     sub: string;
     email: string;
+    role?: string;
     iat?: number;
     exp?: number;
 }
-declare const JwtStrategy_base: new (...args: [opt: import("passport-jwt").StrategyOptionsWithRequest] | [opt: import("passport-jwt").StrategyOptionsWithoutRequest]) => Strategy & {
+declare const JwtStrategy_base: new (...args: [opt: import("passport-jwt").StrategyOptionsWithoutRequest] | [opt: import("passport-jwt").StrategyOptionsWithRequest]) => Strategy & {
     validate(...args: any[]): unknown;
 };
 export declare class JwtStrategy extends JwtStrategy_base {
@@ -13,6 +14,7 @@ export declare class JwtStrategy extends JwtStrategy_base {
     validate(payload: JwtPayload): Promise<{
         userId: string;
         email: string;
+        role: string;
     }>;
 }
 export {};