feat: implement satisfies function in type checker

Co-Authored-By: jt2622

src/main/wacc/Error.scala

@@ -8,6 +8,7 @@ enum Error {
   case UndefinedIdentifier(ident: ast.Ident, identType: renamer.IdentType)
   case FunctionParamsMismatch(expected: Int, got: Int) // TODO not fine
 
+  case SemanticError(pos: Position, msg: String)
   case TypeMismatch(pos: Position, expected: SemType, got: SemType, msg: String)
   case InternalError(pos: Position, msg: String)
 }