get thread information

[farizrifqi]

first time writing typescript and structured code. Code aint fully tested since it even takes almost an hour for me to start using ts. im sorry.

just adding some based on my own code.

added 2 types

• GetThreadResponse

• GetThreadRepliesResponse

• get postID from post url (fetch)

• get thread splitted to getThread (without replies) and getThreadReplies

[junhoyeo]

@farizrifqi Thank you so much for the getPostIDfromURL function! For the getThread and getThreadReplies methods, I decided to merge those two into one, since they're using the same API calls — users can destructure only the properties they want from the result. https://github.com/junhoyeo/threads-api/commit/e8c9527459ac4b4f6fdd64ed3a0164892e491dfc