chore(project): initialize project with core configuration and dependencies

- Add .gitignore and .env.example files for project setup
- Create build script for proto compilation with tonic-prost
- Generate Cargo.lock with all project dependencies
- Configure project structure and ignore patterns for development environment

lib.rs

@@ -0,0 +1,15 @@
+pub mod config;
+pub mod email;
+pub mod email_build;
+pub mod error;
+pub mod queue;
+pub mod server;
+pub mod status;
+
+pub mod pb {
+    pub mod email {
+        pub mod v1 {
+            include!(concat!(env!("OUT_DIR"), "/pb/email.v1.rs"));
+        }
+    }
+}