Fixed content decryption, created base for real rustii CLI

rustii currently only supports unpacking WADs, with packing support being a work-in-progress.

Cargo.toml

@@ -1,12 +1,23 @@
 [package]
 name = "rustii"
+authors = ["NinjaCheetah <ninjacheetah@ncxprogramming.com>"]
+license = "MIT"
+description = "A Rust library and CLI for handling files and formats used by the Wii"
 version = "0.1.0"
+readme = "README.md"
+homepage = "https://github.com/NinjaCheetah/rustii"
+repository = "https://github.com/NinjaCheetah/rustii"
 edition = "2024"
+default-run = "rustii"
 
 [[bin]]
 name = "rustii"
 path = "src/bin/rustii/main.rs"
 
+[[bin]]
+name = "playground"
+path = "src/bin/playground/main.rs"
+
 [lib]
 path = "src/lib.rs"
 test = true
@@ -18,3 +29,4 @@ cbc = "0"
 aes = "0"
 hex = "0"
 sha1 = "0"
+clap = { version = "4", features = ["derive"] }