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/providers/oracle-cloud/variables.tf

@@ -0,0 +1,55 @@
+# Oracle Cloud 提供商变量定义
+
+variable "environment" {
+  description = "环境名称"
+  type        = string
+}
+
+variable "project_name" {
+  description = "项目名称"
+  type        = string
+}
+
+variable "owner" {
+  description = "项目所有者"
+  type        = string
+}
+
+variable "vpc_cidr" {
+  description = "VPC CIDR 块"
+  type        = string
+}
+
+variable "availability_zones" {
+  description = "可用区列表"
+  type        = list(string)
+}
+
+variable "common_tags" {
+  description = "通用标签"
+  type        = map(string)
+}
+
+variable "oci_config" {
+  description = "Oracle Cloud 配置"
+  type = object({
+    tenancy_ocid     = string
+    user_ocid        = string
+    fingerprint      = string
+    private_key_path = string
+    region           = string
+    compartment_ocid = string
+  })
+}
+
+variable "instance_count" {
+  description = "实例数量"
+  type        = number
+  default     = 1
+}
+
+variable "instance_size" {
+  description = "实例规格"
+  type        = string
+  default     = "VM.Standard.E2.1.Micro"
+}