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/users/users.service.js

@@ -0,0 +1,39 @@
+"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);
+};
+var __param = (this && this.__param) || function (paramIndex, decorator) {
+    return function (target, key) { decorator(target, key, paramIndex); }
+};
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.UsersService = void 0;
+const common_1 = require("@nestjs/common");
+const sequelize_1 = require("@nestjs/sequelize");
+const user_model_1 = require("../models/user.model");
+let UsersService = class UsersService {
+    constructor(userModel) {
+        this.userModel = userModel;
+    }
+    async findOne(username) {
+        return this.userModel.findOne({ where: { username } });
+    }
+    async findById(id) {
+        return this.userModel.findByPk(id);
+    }
+    async create(createUserDto) {
+        return this.userModel.create(createUserDto);
+    }
+};
+exports.UsersService = UsersService;
+exports.UsersService = UsersService = __decorate([
+    (0, common_1.Injectable)(),
+    __param(0, (0, sequelize_1.InjectModel)(user_model_1.User)),
+    __metadata("design:paramtypes", [Object])
+], UsersService);
+//# sourceMappingURL=users.service.js.map