Add ProjectZomboid log base classes

ProjectZomboidLog (abstract): extends AnalysableLog, implements
DetectableLogInterface. Centralises the PZ timestamp format
('d-m-y H:i:s.v') and UTC default timezone, plus a makePatternParser()
helper so concrete subclasses only specify their line regex and capture
group names. ProjectZomboidEventLog (abstract): marker base for the ten
single-line structured PZ logs, distinct from the multi-line
ProjectZomboidServerLog. Concrete subclasses follow.

src/Log/ProjectZomboid/ProjectZomboidEventLog.php

@@ -0,0 +1,14 @@
+<?php
+
+namespace IndifferentKetchup\Codex\Log\ProjectZomboid;
+
+/**
+ * Marker base for ProjectZomboid logs whose entries are strictly one line
+ * each (the ten structured event files: admin, BurdJournals, chat,
+ * ClientActionLog, cmd, item, map, PerkLog, pvp, user). Distinct from
+ * ProjectZomboidServerLog, which permits multi-line entries
+ * (DebugLog-server stack traces).
+ */
+abstract class ProjectZomboidEventLog extends ProjectZomboidLog
+{
+}

src/Log/ProjectZomboid/ProjectZomboidLog.php

@@ -0,0 +1,31 @@
+<?php
+
+namespace IndifferentKetchup\Codex\Log\ProjectZomboid;
+
+use DateTimeZone;
+use IndifferentKetchup\Codex\Log\AnalysableLog;
+use IndifferentKetchup\Codex\Log\DetectableLogInterface;
+use IndifferentKetchup\Codex\Parser\PatternParser;
+
+abstract class ProjectZomboidLog extends AnalysableLog implements DetectableLogInterface
+{
+    public const string TIME_FORMAT = 'd-m-y H:i:s.v';
+    public const string DEFAULT_TIMEZONE = 'UTC';
+
+    /**
+     * Build a PatternParser preconfigured with the shared PZ time format
+     * and timezone. Subclasses pass their line regex and the names of the
+     * capture groups by index.
+     *
+     * @param string $pattern PCRE regex anchored at line start, with named groups
+     * @param array<int, string> $matches Match-type constants in capture-group order
+     */
+    protected static function makePatternParser(string $pattern, array $matches): PatternParser
+    {
+        return (new PatternParser())
+            ->setPattern($pattern)
+            ->setMatches($matches)
+            ->setTimeFormat(static::TIME_FORMAT)
+            ->setTimezone(new DateTimeZone(static::DEFAULT_TIMEZONE));
+    }
+}