add .gitignore, readme, license, update description

Cargo.toml

@@ -1,7 +1,9 @@
 [package]
-name = "sdk"
+name = "arch_sdk"
 version = "0.1.0"
 edition = "2021"
+description = "A Rust library for providing data types, constants, RPC methods and helper functions for programs that run inside the Arch Virtual Machine."
+license = "MIT"
 
 [dependencies]
 arch_program = { workspace = true }

README.md

@@ -0,0 +1,12 @@
+# arch-sdk
+
+[<img alt="crates.io" src="https://img.shields.io/crates/v/arch-sdk.svg?style=for-the-badge&color=fc8d62&logo=rust" height="20">](https://crates.io/crates/arch-sdk)
+[<img alt="docs.rs" src="https://img.shields.io/badge/docs.rs-arch_sdk?style=for-the-badge&labelColor=555555&logo=docs.rs" height="20">](https://docs.rs/arch-sdk)
+
+A Rust library for providing data types, constants, RPC methods and helper functions for programs that run inside the Arch Virtual Machine.
+
+Includes utilities for signatures, preparing fees and managing transactions.
+
+#### License
+
+[MIT](https://github.com/Arch-Network/arch-sdk/blob/main/Cargo.toml#L6C1-L6C16)