build: add TypeScript configuration and generate declaration files

- Add tsconfig.json for TypeScript compilation with declaration and source map generation
- Generate .d.ts declaration files for all modules, services, controllers, and models
- Update package.json with NestJS dependencies and TypeScript development tools
- Include database files in the distribution output for persistence

dist/auth/auth.service.js

@@ -0,0 +1,32 @@
+"use strict";
+var __decorate = (this && this.__decorate) || function (decorators, target, key, desc) {
+    var c = arguments.length, r = c < 3 ? target : desc === null ? desc = Object.getOwnPropertyDescriptor(target, key) : desc, d;
+    if (typeof Reflect === "object" && typeof Reflect.decorate === "function") r = Reflect.decorate(decorators, target, key, desc);
+    else for (var i = decorators.length - 1; i >= 0; i--) if (d = decorators[i]) r = (c < 3 ? d(r) : c > 3 ? d(target, key, r) : d(target, key)) || r;
+    return c > 3 && r && Object.defineProperty(target, key, r), r;
+};
+var __metadata = (this && this.__metadata) || function (k, v) {
+    if (typeof Reflect === "object" && typeof Reflect.metadata === "function") return Reflect.metadata(k, v);
+};
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.AuthService = void 0;
+const common_1 = require("@nestjs/common");
+const users_service_1 = require("../users/users.service");
+let AuthService = class AuthService {
+    constructor(usersService) {
+        this.usersService = usersService;
+    }
+    async validateUser(username, pass) {
+        const user = await this.usersService.findOne(username);
+        if (user && user.validPassword(pass)) {
+            return user;
+        }
+        return null;
+    }
+};
+exports.AuthService = AuthService;
+exports.AuthService = AuthService = __decorate([
+    (0, common_1.Injectable)(),
+    __metadata("design:paramtypes", [users_service_1.UsersService])
+], AuthService);
+//# sourceMappingURL=auth.service.js.map