added kill to ProcessManager

src/kernel/ps/ProcessManager.hx

@@ -2,6 +2,8 @@ package kernel.ps;
 
 import kernel.ps.ProcessHandle.HandleConfig;
 
+using tink.CoreApi;
+
 typedef PID = Int;
 
 class ProcessManager {
@@ -18,6 +20,16 @@ class ProcessManager {
 		return pid;
 	}
 
+	public static function kill(pid: PID) {
+		if (!processList.exists(pid)){
+			throw new Error("Process with PID " + pid + " does not exist");
+		}
+
+		var handle = processList.get(pid);
+
+		handle.close();
+	}
+
 	private static function createPID(): PID {
 		// TODO: better PID generation