Correctly apply the import rename to ADTs

src/imports/book.rs

@@ -200,6 +200,7 @@ impl ParseBook {
           name = Name::new(format!("__{}", name));
         }
 
+        adt.name = name.clone();
         adts_map.push((old_name, name.clone()));
       }
 

tests/golden_tests/import_system/import_type.bend

@@ -1,6 +1,6 @@
 from lib/MyOption import (MyOption, MyOption/bind, MyOption/wrap)
 
-def main():
+def main() -> MyOption((u24, u24)):
   with MyOption:
     a <- MyOption/Some(1)
     b <- MyOption/Some(2)

tests/golden_tests/import_system/lib/MyOption.bend

@@ -1,12 +1,14 @@
-type MyOption = (Some val) | (None)
+type MyOption(A):
+  Some { val: A }
+  None
 
-def MyOption/bind(val, nxt):
+def MyOption/bind(val: MyOption(A), nxt: (Id -> Id) -> A -> MyOption(B)) -> MyOption(B):
   match val:
     case MyOption/Some:
       nxt = undefer(nxt)
       return nxt(val.val)
     case MyOption/None:
       return MyOption/None
 
-def MyOption/wrap(val):
+def MyOption/wrap(val: A) -> MyOption(A):
   return MyOption/Some(val)