feat: Initialize UPFS project with login and file upload functionality

- Add Cargo.toml with dependencies for reqwest, serde, tokio, and clap.
- Implement login functionality to retrieve authentication token.
- Create a module for handling file uploads with multipart support.
- Set up command-line interface for file upload operations.
- Include error handling for file existence and HTTP requests.

Cargo.toml

@@ -0,0 +1,11 @@
+[package]
+name = "upfs"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]
+reqwest = { version = "0.11", features = ["json", "multipart"] }
+serde = { version = "1.0", features = ["derive"] }
+serde_json = "1.0"
+tokio = { version = "1.0", features = ["full"] }
+clap = { version = "4.0", features = ["derive"] }