Add Zellij support

src/cli.rs

@@ -9,28 +9,33 @@ pub struct Args {
     #[command(subcommand)]
     pub command: Option<Command>,
     /// Manually run the current exercise using `r` in the watch mode.
-    /// Only use this if Rustlings fails to detect exercise file changes.
+    /// Only use this if Rustlings fails to detect exercise file changes
     #[arg(long)]
     pub manual_run: bool,
+    /// Open the current exercise in a new Zellij pane and close the last one if exists
+    #[arg(long)]
+    pub zellij: bool,
 }
 
 #[derive(Subcommand)]
 pub enum Command {
     /// Initialize the official Rustlings exercises
     Init,
-    /// Run a single exercise. Runs the next pending exercise if the exercise name is not specified
+    /// Run a single exercise.
+    /// Runs the next pending exercise if the exercise name is not specified
     Run {
         /// The name of the exercise
         name: Option<String>,
     },
-    /// Check all the exercises, marking them as done or pending accordingly.
+    /// Check all the exercises, marking them as done or pending accordingly
     CheckAll,
     /// Reset a single exercise
     Reset {
         /// The name of the exercise
         name: String,
     },
-    /// Show a hint. Shows the hint of the next pending exercise if the exercise name is not specified
+    /// Show a hint.
+    /// Shows the hint of the next pending exercise if the exercise name is not specified
     Hint {
         /// The name of the exercise
         name: Option<String>,