feat: logging to log file

soulseek-rs/src/cli.rs

@@ -1,4 +1,5 @@
 use clap::{Parser, Subcommand};
+use std::path::PathBuf;
 
 #[derive(Parser, Debug)]
 #[command(
@@ -32,6 +33,9 @@ pub struct Cli {
     #[arg(short, long, global = true, action = clap::ArgAction::Count)]
     pub verbose: u8,
 
+    #[arg(long, env = "LOG_FILE", help = "Write logs to file instead of stderr")]
+    pub log_file: Option<PathBuf>,
+
     #[command(subcommand)]
     pub command: Option<Commands>,