Restructure into a workspace

Cargo.toml

@@ -1,23 +1,6 @@
-[package]
-name = "umskt"
-version = "0.1.0"
-edition = "2021"
-crate-type = ["lib"]
+[workspace]
 
-[[bin]]
-name = "xpkey"
-
-[profile.release]
-strip = true
-opt-level = "z"
-lto = true
-codegen-units = 1
-
-[dependencies]
-anyhow = "1.0.71"
-bitreader = "0.3.7"
-clap = { version = "4.3.4", features = ["derive"] }
-openssl = { git = "https://github.com/anpage/rust-openssl.git" }
-serde = { version = "1.0.164", features = ["derive"] }
-serde_json = "1.0"
-thiserror = "1.0.40"
+members = [
+    "umskt",
+    "xpkey",
+]