feat: initialize backend structure with core modules and services

- Add base project structure with Cargo.toml and .env
- Implement core modules: models, services, repositories, controllers
- Set up logging, error handling, and middleware
- Configure routes and API documentation
- Add crypto and websocket functionality
- Include basic user management system

Cargo.toml

@@ -0,0 +1,26 @@
+[package]
+name = "OllaHubBackend"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
+actix = "0.13.5"
+actix-rt = "2.11.0"
+actix-web = "4.11.0"
+actix-web-actors = "4.3.0"
+actix-web-lab = "0.24.3"
+awc = "3.8.1"
+serde = { version = "1.0", features = ["derive"] }
+serde_json = "1.0"
+sysinfo = "0.30"
+tokio = { version = "1", features = ["sync","rt","macros"] }
+aes-gcm = "0.10"
+rand = "0.8"
+base64 = "0.21"
+dirs = "5.0"
+uuid = { version = "1", features = ["v4","serde"] }
+hex = "0.4"
+utoipa = { version = "4", features = ["actix_extras"] }
+utoipa-swagger-ui = { version = "4", features = ["actix-web"] }
+validator = { version = "0.16", features = ["derive"] }
+jsonwebtoken = "9"