refactor: replace anyhow with color-eyre

cli/Cargo.toml

@@ -6,9 +6,9 @@ edition = "2024"
 
 [dependencies]
 aes = { workspace = true, optional = true }
-anyhow.workspace = true
 cipher-core.workspace = true
 clap = { version = "4.5", features = ["derive"] }
+color-eyre.workspace = true
 des = { workspace = true, optional = true }
 thiserror.workspace = true
 

cli/src/main.rs

@@ -11,7 +11,8 @@ use crate::{
 use cipher_core::BlockCipher;
 use clap::Parser;
 
-fn main() -> anyhow::Result<()> {
+fn main() -> color_eyre::Result<()> {
+    color_eyre::install()?;
     let Args {
         operation,
         algorithm,