Add cache parsers and POJOs for DEED and RUNE templates

New engine.parsers package:
- cache: DeedParser and RuneParser load COBJECTS/DEED and COBJECTS/RUNE
  JSON straight from the data dir, keyed by file id. CacheParserUtil
  holds the shared JSON helpers.
- objects: standalone DeedTemplate and RuneTemplate covering every
  field in the client data, plus shared PowerGrant/UserPowerAction.
- wpak: placeholder for upcoming wpak parsers.

Not wired into server startup yet.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/engine/parsers/wpak/package-info.java

@@ -0,0 +1,11 @@
+//  • ▌ ▄ ·.  ▄▄▄·  ▄▄ • ▪   ▄▄· ▄▄▄▄·  ▄▄▄·  ▐▄▄▄  ▄▄▄ .
+//  ·██ ▐███▪▐█ ▀█ ▐█ ▀ ▪██ ▐█ ▌▪▐█ ▀█▪▐█ ▀█ •█▌ ▐█▐▌·
+//  ▐█ ▌▐▌▐█·▄█▀▀█ ▄█ ▀█▄▐█·██ ▄▄▐█▀▀█▄▄█▀▀█ ▐█▐ ▐▌▐▀▀▀
+//  ██ ██▌▐█▌▐█ ▪▐▌▐█▄▪▐█▐█▌▐███▌██▄▪▐█▐█ ▪▐▌██▐ █▌▐█▄▄▌
+//  ▀▀  █▪▀▀▀ ▀  ▀ ·▀▀▀▀ ▀▀▀·▀▀▀ ·▀▀▀▀  ▀  ▀ ▀▀  █▪ ▀▀▀
+//      Magicbane Emulator Project © 2013 - 2026
+//                https://www.magicbane.com
+
+// Parsers for the client's .wpak configuration files (powers, effects, etc).
+
+package engine.parsers.wpak;