[U] Migrate to MDX

[Mak1owo]

Component syntax is converted to JSX, which is slightly (completely?) different from Vue template.

From:

<Component text-prop="text-value" :dynamic-prop="js_expression" />

To:

<Component text-prop="text-value" dynamic-prop={"js_expression"} />

The built data is now in a separated branch gh-pages, rather than /ganerated directory in main branch.

[hykilpikonna]

改了好多哇... 辛苦啦，谢谢！！