Kaiheilacardbuilder

添加 KMarkdown 彩色文字的构造

添加 `CardMessageBuilder` `CardBuilder` `ImageGroupBuilder` `ContainerBuilder` `ContextBuilder` `ActionGroupBuilder` 来快捷的构造卡片

添加KMD的特殊用法快捷，KMD能够使用 `+` 拼接。例：`Kmarkdown.bold('Test context: ') + Kmarkdown('abcde')`

**Full Changelog**: https://github.com/DancingSnow0517/KaiheilaCardBuilder/compare/1.2.5...1.3.0

添加 `CardMessage`, `Button` 可以使用 `ThemeTypes`

**Full Changelog**: https://github.com/DancingSnow0517/KaiheilaCardBuilder/compare/1.2.4...1.2.5

Section 能够使用结构体
**Full Changelog**: https://github.com/DancingSnow0517/KaiheilaCardBuilder/compare/1.2.3...1.2.4

修改结构，`Paragraph` 不应该属于文字类元素
**Full Changelog**: https://github.com/DancingSnow0517/KaiheilaCardBuilder/compare/1.2.2...1.2.3

添加卡片的链式调用
**Full Changelog**: https://github.com/DancingSnow0517/KaiheilaCardBuilder/compare/1.2.1...1.2.2