Time splitter: Handle first/second half

Close #31

tests/NodaNameSplitterTest.php

@@ -6,12 +6,14 @@
  */
 declare(strict_types = 1);
 use PHPUnit\Framework\TestCase;
+use PHPUnit\Framework\Attributes\CoversClass;
+use PHPUnit\Framework\Attributes\Small;
 
 /**
  * This script contains tests for the actor name splitter.
- *
- * @covers \NodaNameSplitter
  */
+#[Small]
+#[CoversClass(\NodaIDGetter::class)]
 final class NodaNameSplitterTest extends TestCase {
     /**
      * Test to check whether the HTML page is correctly generated.