New source pull request + Update domain

[dragonx943]

• Update Domain: NetTruyenHE (nettruyenhe.com)

• New source:

• Name: Cứu Truyện
• Url: https://cuutruyen.net/ - https://nettrom.com/ - https://hetcuutruyen.net/ - https://cuutruyent9sv7.xyz/
• Nsfw: i dont know (NSFW = false)

This is my first time i wrote Kotlin script so i dont have too much knowledge about this programming language, i just refer to the "Example of Json API usage" at CONTRIBUTING.md and CuuTruyen.kt from Tachiyomi unofficial source to write it, it took me 5-6 days to write it with the help of A.I. so i know it still has a lot of bugs...

• Info: This site has an API to extract data: https://cuutruyen.net/api/v2
• Example:

• https://cuutruyen.net/api/v2/mangas/recently_updated?page=1&per_page=30
• https://cuutruyen.net/api/v2/mangas/top
• https://cuutruyen.net/api/v2/mangas/search?q=isekai&page=1&per_page=50
• https://cuutruyen.net/api/v2/chapters/36524

And in the process of writing it, i realized that all the images coming from "image_url" value in that API were encrypted, causing the images to be downloaded incompletely. I tried copying the decoding from Tachiyomi unofficial source with the help of A.I. coding, maybe when compiling there will be no problem but i don't think it can actually work!

However, i still want to contribute this source to kotatsu-parser, because after all, i spent time learning about Kotlin and writing it, hoping that it will soon be fixed and pushed to the library.

[dragonx943]

@Koitharu check my new commit