Fix MiniMessage formatting: default italic on panel items and cross-nested tags in legacyToMiniMessage

[Copilot]

Panel items render all text italic and show literal </bold> tags in-game, despite correct MiniMessage markup in locale files.

Default italic on panel items

Minecraft applies italic by default to item display names and lore. PanelItem.setName() and setDescription() passed Adventure components to meta.displayName()/meta.lore() without overriding this. Now wraps parsed components with italic=false when italic is not explicitly set:

private static Component removeDefaultItalic(Component component) {
    if (component.decoration(TextDecoration.ITALIC) == TextDecoration.State.NOT_SET) {
        return component.decoration(TextDecoration.ITALIC, TextDecoration.State.FALSE);
    }
    return component;
}

Cross-nested tags in legacyToMiniMessage

Adventure's LegacyComponentSerializer doesn't emit §r when bold ends at a color boundary. §c§lALL §atext (bold carries through color change) was converted to:

<red><bold>ALL </red><green>text</green></bold>

MiniMessage can't match </bold> after </green> is already closed, so it renders as literal text. Fixed by closing decoration tags before color tags, then reopening them:

<red><bold>ALL </bold></red><bold><green>text</green></bold>

The same fix is applied to hex color code (<color:#RRGGBB>) handling in the same method.

[sonarqubecloud]

Quality Gate failed

Failed conditions
9.9% Duplication on New Code (required ≤ 3%)

See analysis details on SonarQube Cloud