refactor: 更新项目结构和文档，移除不再使用的配置文件

- 修改README.md，更新项目特性和目录结构说明
- 重命名基础设施代码目录为tofu，并添加Docker Swarm配置目录
- 移除不再使用的Docker Compose和Traefik配置文件
- 更新Terraform配置，专注于Oracle Cloud支持，移除华为云相关配置
- 清理开发环境变量和示例文件

tofu/environments/dev/terraform.tfvars.example

@@ -0,0 +1,61 @@
+# 开发环境配置示例
+# 复制此文件为 terraform.tfvars 并填入实际值
+
+# 基本配置
+environment = "dev"
+project_name = "mgmt"
+owner = "ben"
+
+# 要启用的云服务商
+cloud_providers = ["oracle", "huawei"]
+
+# 网络配置
+vpc_cidr = "10.0.0.0/16"
+availability_zones = ["a", "b"]
+
+# 通用标签
+common_tags = {
+  Environment = "dev"
+  Project     = "mgmt"
+  Owner       = "ben"
+  ManagedBy   = "opentofu"
+}
+
+# Oracle Cloud 配置
+oci_config = {
+  tenancy_ocid     = "ocid1.tenancy.oc1..your-tenancy-id"
+  user_ocid        = "ocid1.user.oc1..your-user-id"
+  fingerprint      = "your-key-fingerprint"
+  private_key_path = "~/.oci/oci_api_key.pem"
+  region           = "ap-seoul-1"
+  compartment_ocid = "ocid1.compartment.oc1..your-compartment-id"
+}
+
+# 华为云配置
+huawei_config = {
+  access_key = "your-access-key"
+  secret_key = "your-secret-key"
+  region     = "cn-north-4"
+  project_id = "your-project-id"
+}
+
+# Google Cloud 配置 (可选)
+gcp_config = {
+  project_id = "your-project-id"
+  region     = "asia-northeast3"
+  zone       = "asia-northeast3-a"
+  credentials_file = "~/.gcp/service-account.json"
+}
+
+# AWS 配置 (可选)
+aws_config = {
+  region     = "ap-northeast-2"
+  access_key = "your-access-key"
+  secret_key = "your-secret-key"
+}
+
+# DigitalOcean 配置 (可选)
+do_config = {
+  token  = "your-do-token"
+  region = "sgp1"
+}