Update README.md, consistent use of spaces instead of tabs, better examples

bin/classes/Job.php

@@ -0,0 +1,19 @@
+<?php
+
+class Job
+{
+    private string $title;
+
+    public function __construct(string $title)
+    {
+        $this->title = $title;
+    }
+
+    public function __invoke()
+    {
+        cli_set_process_title("php {$this->title}");
+        print("* {$this->title}");
+        sleep(1);
+        print("\r  {$this->title}\n");
+    }
+}