chore: add gitignore files and database fix admin user script

add root, server, client gitignore files for different environment ignore rules, and add sql script to fix or initialize admin user with bcrypt encrypted password

database/fix_admin_user.sql

@@ -0,0 +1,11 @@
+-- 检查是否存在 admin 用户
+SELECT * FROM sys_user WHERE username = 'admin';
+
+-- 如果不存在或密码错误，执行以下插入/更新
+-- 密码是 admin123，使用 BCrypt 加密
+INSERT INTO sys_user (username, password, nickname, status, create_time, update_time) 
+VALUES ('admin', '$2a$10$N.zmdr9k7uOCQb376NoUnuTJ8iAt6Z5EHsM8lE9lBOsl7iAt6Z5EO', '管理员', 1, NOW(), NOW())
+ON DUPLICATE KEY UPDATE 
+password = '$2a$10$N.zmdr9k7uOCQb376NoUnuTJ8iAt6Z5EHsM8lE9lBOsl7iAt6Z5EO',
+status = 1,
+update_time = NOW();