Persist app state (#21)

src/config.rs

@@ -5,18 +5,20 @@ use std::fs;
 use std::path::PathBuf;
 pub struct Config {
     pub log_dir: PathBuf,
+    pub data_dir: PathBuf,
 }
 
 impl Config {
     pub fn init() -> Result<Self> {
         let log_dir = get_default_state_dir()?.join("logs");
         fs::create_dir_all(&log_dir)?;
+        let data_dir = get_default_state_dir()?.join("data");
+        fs::create_dir_all(&data_dir)?;
 
-        Ok(Self { log_dir })
+        Ok(Self { log_dir, data_dir })
     }
 }
 
-// fn new
 pub fn get_project_dir() -> Result<ProjectDirs> {
     let dirs = ProjectDirs::from("", "", APP_NAME)
         .ok_or_else(|| eyre!("Failed to get project directories"))?;