Item system is dated

CMDBOOK-2388 - Reported by Dark_Arc

Currently CommandBook's item system is very dated and supports only basic operations. The goal of this bugs is to track the progress of updating this system.

The current concept I am planning involves the support of this new functionality through a new component dedicated to item management and resolution.

This new component must enable support for as many elements of items in vanilla minecraft as possible under the bukkit API, and also allow external mods to add in their own "custom" items which they can define specific build instructions for based on a name based item matching system.

首先定位 CommandBook 现有的 item-system 入口点，并审查它们如何使用 Bukkit API。定义拟议的 item-management 组件范围，包括 vanilla item 的覆盖范围以及基于名称的 custom-item 构建说明；当支持的行为和集成边界得到明确规定时，即视为完成。

由索引模型根据 Issue 内容生成。