Rewrite the demo app in TypeScript + React

[dahlia]

The current demo app is written in Elm, which is unpopular and has quite small ecosystem relative to JavaScript/TypeScript. In order to make it more maintainable and easier to contribute, it should be rewritten in more widely-used language and framework.

[love-adela]

오홍.. 어떤걸 바꾸길 원하시나용? 👀

[dahlia]

https://dahlia.github.io/seonbi/에 올라가 있는 데모 앱이 Elm으로 짠 건데, 거의 아무도 안 쓰니까 많이들 쓰는 TypeScript + React로 다시 짜는 게 낫다고 생각했습니다. 소스 코드는 리포지터리의 demo/ 디렉터리 안에 있습니다.

[channprj]

If there is no person in charge, I will work on it. 👀✨ (...until this year 😂)

[dahlia]

FYI It seems @moreal also has made some progress on his own similar work.