perf: reduce action bar and localization overhead

[twme-ai]

Summary

• reduce per-update overhead in the action bar task by avoiding display-set copies and only ray tracing target blocks for classic mode
• cache optional localization lookups used by BlockData value translations and reduce repeated format lookups while rendering classic action bars
• clear configured language files before reload to prevent duplicated static config entries
• reuse MiniMessage instances and avoid duplicate ItemMeta reads for debug stick checks

Tests

• mvn test
• mvn package
• git diff --check