Add NYTimes recipe extraction from __NEXT_DATA__ JSON tag

- Add Roux.NYTimes module with:
  - extractNextData: finds <script id="__NEXT_DATA__"> tag in HTML
    and parses its JSON content via aeson
  - parseNYTRecipe: maps NYTimes recipe JSON structure into a
    typed intermediate representation (NYTRecipe, NYTIngredientGroup,
    NYTIngredientItem, NYTStepGroup, NYTStepItem)
- Supports all NYTimes Cooking data: title, URL, total time, yield,
  topnote, ingredient groups (with section names), step groups
- Add aeson to dependencies
- Add 4 tests: extraction + parsing for both fried-rice and
  carrot-risotto example HTML files
- Wire NYTimesSpec into test runner

test/Spec.hs

@@ -3,13 +3,16 @@ module Main (main) where
 import Test.Tasty (defaultMain, testGroup)
 import Test.Tasty.Hspec (testSpec)
 
+import qualified Roux.NYTimesSpec
 import qualified Roux.ParserSpec
 
 main :: IO ()
 main = do
     parserTests <- testSpec "Parser" Roux.ParserSpec.spec
+    nytTests <- testSpec "NYTimes" Roux.NYTimesSpec.spec
     defaultMain $
         testGroup
             "roux-server"
             [ parserTests
+            , nytTests
             ]