docs: add more documentation

sdgb-cli/src/commands.rs

@@ -27,6 +27,7 @@ pub enum Commands {
         qrcode_content: String,
     },
 
+    /// Retrieve update package of SDGB
     AuthLite {
         #[arg(short, long, default_value = "1.50")]
         title_ver: String,
@@ -34,12 +35,14 @@ pub enum Commands {
         variant: AuthLiteVariant,
     },
 
-    // below are login-free
+    /// Test delay to SDGB server
     Ping,
+    /// Get basic info
     Preview {
         #[arg(short, long)]
         user_id: u32,
     },
+    /// Get B35 + B15 play records
     Rating {
         #[arg(short, long)]
         user_id: u32,
@@ -51,12 +54,15 @@ pub enum Commands {
         #[arg(short, long, default_value_t = RatingFormat::default())]
         format: RatingFormat,
     },
+    /// Get all play records
     MusicDetail {
         #[arg(short, long)]
         user_id: u32,
     },
 
-    // below requires login
+    /// Retrieve full userdata
+    ///
+    /// WARNING: This requires to login & logout your account
     Userdata {
         #[arg(short, long)]
         user_id: u32,