feat(shared): add shared module with domain primitives, infrastructure services, and utils

Domain primitives: BaseEntity, AggregateRoot, ValueObject, DomainEvent, Result<T,E>
Infrastructure: PrismaService, RedisService, LoggerService (pino), EventBusService
Utils: Vietnam phone validator/normalizer, VND currency formatter, Vietnamese slug generator
Includes 45 unit tests covering all domain primitives, validators, and formatters.

Co-Authored-By: Paperclip <noreply@paperclip.ing>

apps/api/tsconfig.json

@@ -10,9 +10,9 @@
     "declaration": false,
     "declarationMap": false,
     "paths": {
-      "@modules/*": ["../../src/modules/*"]
+      "@modules/*": ["./src/modules/*"]
     }
   },
-  "include": ["src/**/*", "../../src/modules/**/*"],
-  "exclude": ["node_modules", "dist"]
+  "include": ["src/**/*"],
+  "exclude": ["node_modules", "dist", "**/*.spec.ts", "**/__tests__/**"]
 }