Add ProjectZomboidChatLog (chat.txt)

Handles both chat-engine events (bracketed level prefix) and bare
server-alert lines via an optional level group. Detectors: filename
match on _chat.txt plus content signatures for ChatMessage{...} log
entries and the chat-server initialization banner. CHAT_MESSAGE and
SERVER_ALERT named-group regexes ride along on ChatPattern for analyser
extraction in phase B.

src/Log/ProjectZomboid/ProjectZomboidChatLog.php

@@ -0,0 +1,47 @@
+<?php
+
+namespace IndifferentKetchup\Codex\Log\ProjectZomboid;
+
+use IndifferentKetchup\Codex\Analyser\AnalyserInterface;
+use IndifferentKetchup\Codex\Analyser\PatternAnalyser;
+use IndifferentKetchup\Codex\Detective\FilenameDetector;
+use IndifferentKetchup\Codex\Detective\WeightedSinglePatternDetector;
+use IndifferentKetchup\Codex\Parser\ParserInterface;
+use IndifferentKetchup\Codex\Parser\PatternParser;
+use IndifferentKetchup\Codex\Pattern\ProjectZomboid\ChatPattern;
+
+class ProjectZomboidChatLog extends ProjectZomboidEventLog
+{
+    public static function getDefaultParser(): ParserInterface
+    {
+        return static::makePatternParser(
+            ChatPattern::LINE,
+            [PatternParser::TIME, PatternParser::LEVEL]
+        );
+    }
+
+    public static function getDefaultAnalyser(): AnalyserInterface
+    {
+        return new PatternAnalyser();
+    }
+
+    public static function getDetectors(): array
+    {
+        return [
+            (new FilenameDetector())
+                ->setPattern('/_chat\.txt$/')
+                ->setWeight(0.95),
+            (new WeightedSinglePatternDetector())
+                ->setPattern('/Got message:ChatMessage\{chat=\w+/')
+                ->setWeight(0.95),
+            (new WeightedSinglePatternDetector())
+                ->setPattern('/Start chat server initialization/')
+                ->setWeight(0.85),
+        ];
+    }
+
+    public function getTitle(): string
+    {
+        return "Project Zomboid Chat Log";
+    }
+}

src/Pattern/ProjectZomboid/ChatPattern.php

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+<?php
+
+namespace IndifferentKetchup\Codex\Pattern\ProjectZomboid;
+
+/**
+ * Regex constants for the Project Zomboid chat.txt format.
+ *
+ * Two row variants share the file: bracket-level chat-engine events
+ * (e.g. [time][info] message) and bare server-alert messages
+ * (e.g. [time] Server alert ...). The LINE pattern accepts both via an
+ * optional non-capturing wrapper around the level.
+ *
+ * LINE captures, in order:
+ *   1. time  (DD-MM-YY HH:MM:SS.mmm)
+ *   2. level (info | warn | error | empty for server alerts)
+ */
+class ChatPattern
+{
+    public const string LINE = '/^\[(\d{2}-\d{2}-\d{2} \d{2}:\d{2}:\d{2}\.\d{3})\](?:\[(\w+)\])?\s+.*$/';
+
+    public const string CHAT_MESSAGE = '/ChatMessage\{chat=(?<channel>\w+), author=\'(?<author>[^\']+)\', text=\'(?<text>.*?)\'\}/';
+
+    public const string SERVER_ALERT = '/^Server alert message:\s*\'(?<text>.*?)\'\s+sent\.\.?$/';
+}