Revert "Replace tweet endpoint with GraphQL"

This reverts commit 19adc658c3.

src/types.nim

@@ -9,7 +9,6 @@ type
   InternalError* = object of CatchableError
 
   Api* {.pure.} = enum
-    tweetDetail
     userShow
     timeline
     search
@@ -177,6 +176,7 @@ type
     available*: bool
     tombstone*: string
     location*: string
+    source*: string
     stats*: TweetStats
     retweet*: Option[Tweet]
     attribution*: Option[User]