refactor(common): 移除HTTP消息转换器配置类- 删除了HttpMessageConverterConfigure配置类- 移除了Markdown HTTP消息转换器的自定义配置- 清理了相关的JSON解析器设置和媒体类型支持配置
src/main/java/cc/mrbird/febs/common/configure/HttpMessageConverterConfigure.java File was deleted
