feat: added clearing the process after it was killed

Kit/process.swift

@@ -266,6 +266,8 @@ public class ProcessView: NSStackView {
     @objc private func kill() {
         if let pid = self.pid {
             _ = syncShell("kill -9 \(pid)")
+            self.clear()
+            self.setLock(false)
         }
     }
 }