refactor: replace all rust Result with anyhow::Result (#103)

src/utils/config.rs

@@ -1,6 +1,7 @@
-use std::{error::Error, path::PathBuf};
+use anyhow::Result;
+use std::path::PathBuf;
 
-pub fn get_config_path() -> Result<PathBuf, Box<dyn Error>> {
+pub fn get_config_path() -> Result<PathBuf> {
     let config_path = dirs::config_dir().expect("Failed to obtain config dir");
     Ok(config_path.join("pwsp"))
 }