refactor: rename cashu-sdk to cdk

Cargo.toml

@@ -1,7 +1,7 @@
 [workspace]
 members = [
     "crates/cashu",
-    "crates/cashu-sdk",
+    "crates/cdk",
 ]
 resolver = "2"
 

crates/cdk/Cargo.toml

@@ -1,5 +1,5 @@
 [package]
-name = "cashu-sdk"
+name = "cdk"
 version = "0.1.0"
 edition = "2021"
 authors = ["thesimplekid"]

crates/cdk/README.md

@@ -0,0 +1,19 @@
+
+# Cashu Development Kit
+
+## Implemented [NUTs](https://github.com/cashubtc/nuts/):
+
+- :heavy_check_mark: [NUT-00](https://github.com/cashubtc/nuts/blob/main/00.md)
+- :heavy_check_mark: [NUT-01](https://github.com/cashubtc/nuts/blob/main/01.md)
+- :heavy_check_mark: [NUT-02](https://github.com/cashubtc/nuts/blob/main/02.md)
+- :heavy_check_mark: [NUT-03](https://github.com/cashubtc/nuts/blob/main/03.md)
+- :heavy_check_mark: [NUT-04](https://github.com/cashubtc/nuts/blob/main/04.md)
+- :heavy_check_mark: [NUT-05](https://github.com/cashubtc/nuts/blob/main/05.md)
+- :heavy_check_mark: [NUT-06](https://github.com/cashubtc/nuts/blob/main/06.md)
+- :heavy_check_mark: [NUT-07](https://github.com/cashubtc/nuts/blob/main/07.md)
+- :heavy_check_mark: [NUT-08](https://github.com/cashubtc/nuts/blob/main/08.md)
+- :heavy_check_mark: [NUT-09](https://github.com/cashubtc/nuts/blob/main/09.md)
+- :heavy_check_mark: [NUT-10](https://github.com/cashubtc/nuts/blob/main/10.md)
+- :heavy_check_mark: [NUT-11](https://github.com/cashubtc/nuts/blob/main/11.md)
+- :heavy_check_mark: [NUT-12](https://github.com/cashubtc/nuts/blob/main/12.md)
+- :heavy_check_mark: [NUT-13](https://github.com/cashubtc/nuts/blob/main/13.md)