Add ProjectZomboidPerkLog (PerkLog.txt)

Per-line skill snapshot log; each Login event is paired with a perks
row containing comma-separated Skill=N tokens. PERK_PAIR regex extracts
each pair via preg_match_all for analyser use. Detectors: filename
match plus content signature on the unique '[Cooking=N, Fitness=N,
Strength=N,' prefix of the perks-row bracket.

src/Log/ProjectZomboid/ProjectZomboidPerkLog.php

@@ -0,0 +1,44 @@
+<?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\PerkPattern;
+
+class ProjectZomboidPerkLog extends ProjectZomboidEventLog
+{
+    public static function getDefaultParser(): ParserInterface
+    {
+        return static::makePatternParser(
+            PerkPattern::LINE,
+            [PatternParser::TIME]
+        );
+    }
+
+    public static function getDefaultAnalyser(): AnalyserInterface
+    {
+        return new PatternAnalyser();
+    }
+
+    public static function getDetectors(): array
+    {
+        return [
+            (new FilenameDetector())
+                ->setPattern('/_PerkLog\.txt$/')
+                ->setWeight(0.95),
+            (new WeightedSinglePatternDetector())
+                ->setPattern('/\[Cooking=\d+, Fitness=\d+, Strength=\d+,/')
+                ->setWeight(0.95),
+        ];
+    }
+
+    public function getTitle(): string
+    {
+        return "Project Zomboid Perk Log";
+    }
+}

src/Pattern/ProjectZomboid/PerkPattern.php

@@ -0,0 +1,21 @@
+<?php
+
+namespace IndifferentKetchup\Codex\Pattern\ProjectZomboid;
+
+/**
+ * Regex constants for the Project Zomboid PerkLog.txt format.
+ *
+ *   [time] [steamid][player][x,y,z][event-or-perks][Hours Survived: N].
+ *
+ * The fourth bracketed field is either a single token (Login, Logout,
+ * LevelUp, etc.) or a comma-separated list of Skill=N pairs. Both fit
+ * the same character class.
+ */
+class PerkPattern
+{
+    public const string LINE = '/^\[(\d{2}-\d{2}-\d{2} \d{2}:\d{2}:\d{2}\.\d{3})\] \[\d{17}\]\[[^\]]+\]\[\d+,\d+,\d+\]\[[^\]]+\]\[Hours Survived: \d+\]\.$/';
+
+    public const string FIELDS = '/^\[\d{2}-\d{2}-\d{2} \d{2}:\d{2}:\d{2}\.\d{3}\] \[(?<steamid>\d{17})\]\[(?<player>[^\]]+)\]\[(?<x>\d+),(?<y>\d+),(?<z>\d+)\]\[(?<event>[^\]]+)\]\[Hours Survived: (?<hours>\d+)\]\.$/';
+
+    public const string PERK_PAIR = '/(?<skill>[A-Za-z_]+)=(?<level>\d+)/';
+}