feat: 初始化ERP平台底座项目结构

- 添加基础crate结构(erp-core, erp-common)
- 实现核心模块trait和事件总线
- 配置Docker开发环境(PostgreSQL+Redis)
- 添加Tauri桌面端基础框架
- 设置CI/CD工作流
- 编写项目协作规范文档(CLAUDE.md)

Cargo.toml

@@ -0,0 +1,74 @@
+[workspace]
+resolver = "2"
+members = [
+    "crates/erp-core",
+    "crates/erp-common",
+    "crates/erp-server",
+    "crates/erp-auth",
+    "crates/erp-workflow",
+    "crates/erp-message",
+    "crates/erp-config",
+]
+
+[workspace.package]
+version = "0.1.0"
+edition = "2024"
+license = "MIT"
+
+[workspace.dependencies]
+# Async
+tokio = { version = "1", features = ["full"] }
+
+# Web
+axum = "0.8"
+tower = "0.5"
+tower-http = { version = "0.6", features = ["cors", "trace", "compression-gzip"] }
+
+# Database
+sea-orm = { version = "1.1", features = [
+    "sqlx-postgres", "runtime-tokio-rustls", "macros", "with-uuid", "with-chrono", "with-json"
+] }
+sea-orm-migration = { version = "1.1", features = ["sqlx-postgres", "runtime-tokio-rustls"] }
+
+# Serialization
+serde = { version = "1", features = ["derive"] }
+serde_json = "1"
+
+# UUID & Time
+uuid = { version = "1", features = ["v7", "serde"] }
+chrono = { version = "0.4", features = ["serde"] }
+
+# Error handling
+thiserror = "2"
+anyhow = "1"
+
+# Logging
+tracing = "0.1"
+tracing-subscriber = { version = "0.3", features = ["env-filter", "json"] }
+
+# Config
+config = "0.14"
+
+# Redis
+redis = { version = "0.27", features = ["tokio-comp", "connection-manager"] }
+
+# JWT
+jsonwebtoken = "9"
+
+# Password hashing
+argon2 = "0.5"
+
+# API docs
+utoipa = { version = "5", features = ["axum_extras", "uuid", "chrono"] }
+utoipa-swagger-ui = { version = "8", features = ["axum"] }
+
+# Validation
+validator = { version = "0.19", features = ["derive"] }
+
+# Internal crates
+erp-core = { path = "crates/erp-core" }
+erp-common = { path = "crates/erp-common" }
+erp-auth = { path = "crates/erp-auth" }
+erp-workflow = { path = "crates/erp-workflow" }
+erp-message = { path = "crates/erp-message" }
+erp-config = { path = "crates/erp-config" }