feat(cli): add close-workspace cmd

This commit introduces a new komorebic command, close-workspace. This
command will remove the focused workspace from the window manager state
if the following conditions are met:

1. The number of workspaces on the focused monitor are >1
2. The workspace is empty
3. The workspace is unnamed

The third condition is to ensure that we are not removing workspaces
which have been declared in the static configuration file.

komorebic/src/main.rs

@@ -1052,6 +1052,8 @@ enum SubCommand {
     /// Focus the specified workspace
     #[clap(arg_required_else_help = true)]
     FocusNamedWorkspace(FocusNamedWorkspace),
+    /// Close the focused workspace (must be empty and unnamed)
+    CloseWorkspace,
     /// Focus the monitor in the given cycle direction
     #[clap(arg_required_else_help = true)]
     CycleMonitor(CycleMonitor),
@@ -2338,6 +2340,9 @@ Stop-Process -Name:komorebi -ErrorAction SilentlyContinue
         SubCommand::FocusNamedWorkspace(arg) => {
             send_message(&SocketMessage::FocusNamedWorkspace(arg.workspace))?;
         }
+        SubCommand::CloseWorkspace => {
+            send_message(&SocketMessage::CloseWorkspace)?;
+        }
         SubCommand::CycleMonitor(arg) => {
             send_message(&SocketMessage::CycleFocusMonitor(arg.cycle_direction))?;
         }