kpcli: adds 'db' subcommand for interacting with the database

kpcli/src/main.rs

@@ -1,5 +1,8 @@
+mod client;
+mod db;
 mod printers;
-mod client; 
+
+use anyhow::Result;
 use clap::{Parser, Subcommand};
 
 /// A command line interface for the Kordophone library and daemon
@@ -17,11 +20,18 @@ enum Commands {
         #[command(subcommand)]
         command: client::Commands,
     },
+
+    /// Commands for the cache database
+    Db {
+        #[command(subcommand)]
+        command: db::Commands,
+    }
 }
 
-async fn run_command(command: Commands) -> Result<(), Box<dyn std::error::Error>> {
+async fn run_command(command: Commands) -> Result<()> {
     match command {
         Commands::Client { command } => client::Commands::run(command).await,
+        Commands::Db { command } => db::Commands::run(command).await,
     }
 }