Refactor lore display methods to use LoreBuilder utility

[FirebrickRed]

Problem

The methods in , , , and contain significant code duplication for displaying list sections and player choices.

Duplicated Patterns

1. List display pattern (~10 occurrences):

lore.add(Component.text("Header:").color(color));
for (String item : items) {
    lore.add(Component.text("  • " + item).color(color));
}

2. Language choice display (duplicated in Race, SubRace, Background):

for (ChoiceEntry choice : playerChoices) {
    if (choice.type() == PlayersChoice.ChoiceType.LANGUAGE) {
        // ... 10+ lines of similar code
    }
}

Proposed Solution

Create a LoreBuilder utility class in io.papermc.jkvttplugin.util with fluent API methods:

• addListSection(header, items, color) - For displaying bulleted lists
• addLanguageChoices(fixedLanguages, playerChoices) - For language display
• blankLine() - For spacing
• build() - Returns the final lore list

Benefits

• DRY principle - eliminate ~50+ lines of duplicated code
• Consistent formatting across all menus
• Easier to modify display format in one place
• More readable lore methods

Files to Update

• src/main/java/io/papermc/jkvttplugin/data/model/DndRace.java
• src/main/java/io/papermc/jkvttplugin/data/model/DndClass.java
• src/main/java/io/papermc/jkvttplugin/data/model/DndBackground.java
• src/main/java/io/papermc/jkvttplugin/data/model/DndSubRace.java
• (new) src/main/java/io/papermc/jkvttplugin/util/LoreBuilder.java

Notes

This refactoring was identified after implementing Issue #33. The current implementation works correctly, but would benefit from this cleanup once the pattern is stable.