[FEATURE] 提供Jackson兼容API

大数据的主要引擎flink/trino目前使用jackson做JSON解析，fastjson2其中一个目标是为大数据场景提供高性能的JSON解析。

为了方便Jackson用户迁移到FASTJSON2，提供一个新的module，提供常用的jackson2 API，让用户能够通过maven依赖替换就可以实现迁移到fastjson2。

目录结构在
/adapter-jackson

目的在若干个版本迭代后，使用jackson的用户能不修改代码能升级到fastjson2，获得性能的提升。

Start by reviewing the /adapter-jackson directory and the scope of the linked pull request. Determine which commonly used Jackson 2 APIs are required for Maven dependency replacement without application code changes, and define completion around those APIs being supported across the planned iterations.

Written by the indexing model from the issue text.