Add ProjectZomboidItemLog (item.txt)

Per-line item gain/loss event log. Parser captures only the timestamp;
analysers decompose location/delta/item via ItemPattern::FIELDS.
Detectors: filename match plus content signature on the
container/floor/inventory location verbs paired with a signed delta.

test/tests/Games/ProjectZomboid/Log/ProjectZomboidItemLogTest.php

@@ -0,0 +1,44 @@
+<?php
+
+namespace IndifferentKetchup\Codex\Test\Tests\Games\ProjectZomboid\Log;
+
+use IndifferentKetchup\Codex\Detective\Detective;
+use IndifferentKetchup\Codex\Log\File\PathLogFile;
+use IndifferentKetchup\Codex\Log\ProjectZomboid\ProjectZomboidItemLog;
+use IndifferentKetchup\Codex\Pattern\ProjectZomboid\ItemPattern;
+use PHPUnit\Framework\TestCase;
+
+class ProjectZomboidItemLogTest extends TestCase
+{
+    private function fixturePath(): string
+    {
+        return __DIR__ . '/../../../../src/Games/ProjectZomboid/fixtures/item-minimal.txt';
+    }
+
+    public function testParsesEachLineAsAnEntry(): void
+    {
+        $log = (new ProjectZomboidItemLog())->setLogFile(new PathLogFile($this->fixturePath()));
+        $log->parse();
+
+        $this->assertCount(10, $log->getEntries());
+    }
+
+    public function testFieldsRegexExtractsItemAndDelta(): void
+    {
+        $line = '[16-04-26 19:42:25.223] 76561198000000002 "Player2" inventory +5 1011,2011,0 [Base.Bullets9mm].';
+        $this->assertSame(1, preg_match(ItemPattern::FIELDS, $line, $m));
+        $this->assertSame('Player2', $m['player']);
+        $this->assertSame('inventory', $m['location']);
+        $this->assertSame('+5', $m['delta']);
+        $this->assertSame('Base.Bullets9mm', $m['item']);
+    }
+
+    public function testDetectiveDispatchesByContent(): void
+    {
+        $detective = (new Detective())
+            ->setLogFile(new PathLogFile($this->fixturePath()))
+            ->addPossibleLogClass(ProjectZomboidItemLog::class);
+
+        $this->assertInstanceOf(ProjectZomboidItemLog::class, $detective->detect());
+    }
+}