Quest plugin modernization

[KagamiChan]

Coding

• Use TypeScript

Parser

• Explicit: avoid reading data from outside function parameters to make function dependency clear
• Functional
• Behavior unit testing

Quest data

• Use JSON schema to verify content

[lawvs]

In order to improve maintainability, I intend to transfer the quest data to kcwiki-quest-data.

The JSON schema for quest data has been partially completed.

[KagamiChan]

@lawvs Cool

I think we could try quicktype to do the conversion

And to ease the development, the parser could also be maintained there