Scaffold Hytale game stubs

Add empty per-component subdirectories under src/{Analyser,Log,Parser,Pattern}/Hytale/
with .gitkeep markers, plus HytaleDetective stub extending the base Detective with
a TODO body. Smoke test under test/tests/Games/Hytale/ asserts the detective is
instantiable.

src/Detective/Hytale/HytaleDetective.php

@@ -0,0 +1,10 @@
+<?php
+
+namespace IndifferentKetchup\Codex\Detective\Hytale;
+
+use IndifferentKetchup\Codex\Detective\Detective;
+
+class HytaleDetective extends Detective
+{
+    // TODO: implement game-specific log type detection
+}