Make the documentation or readme better

[ForteScarlet]

Maybe I need to think about rewriting the documentation?

[ForteScarlet]

Part of the optimization has already been done in #93.

[ForteScarlet]

Are there any lightweight document building tools that support i18n, other than vuepress, vitepress, and docudocusaurus (I've used these before, and they're still a bit heavy in comparison. I want to use Writerside, but it doesn't support i18n yet.)? It would be even better if they were visually appealing.

[ForteScarlet]

Independent document website has been deployed: https://fortescarlet.github.io/kotlin-suspend-transform-compiler-plugin/