feat(ahk): add cmd to generate helper lib

Woke up today and thought this would be a cool way to learn more about
deriving functionality with proc macros.

Hopefully having this wrapper/helper library will make first time
configuration for new users easier.

derive-ahk/Cargo.toml

@@ -0,0 +1,14 @@
+[package]
+name = "derive-ahk"
+version = "0.1.0"
+edition = "2018"
+
+[lib]
+proc-macro = true
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+proc-macro2 = "1.0"
+syn = "1.0"
+quote = "1.0"