Fix parser for personal recipes: newlines, ranges, &, markdown-style headings

Three categories of fixes:

1. Multi-line steps: removed \n from pText exclusion list so newlines
   within a step are consumed as regular text
2. Range timers (e.g. ~{14-18%minutes}): handle hyphen-separated
   ranges in parseSimpleRational by taking the lower value
3. & in ingredient names: added & to pSingleNameChar and
   pMultiNameChar char sets
4. Markdown-style # headings: added pAnyChar fallback so # followed
   by invalid cookware name falls through to text consumption
5. Note detection: tightened > check to require >  (with space)
   or > followed by non->, preventing >> metadata from being
   treated as notes

app/check-recipes/Main.hs

@@ -0,0 +1,31 @@
+{-# LANGUAGE OverloadedStrings #-}
+
+module Main (main) where
+
+import System.Directory (listDirectory)
+import System.Environment (getArgs)
+import System.FilePath (takeExtension, (</>))
+import qualified Data.Text.IO as TIO
+import Roux.Parser (parseCookFile)
+
+main :: IO ()
+main = do
+    args <- getArgs
+    let recipeDir = case args of
+            (d : _) -> d
+            [] -> error "Usage: check-recipes <recipe-directory>"
+    entries <- listDirectory recipeDir
+    let cookFiles = filter ((== ".cook") . takeExtension) (map (recipeDir </>) entries)
+    putStrLn $ "Found " ++ show (length cookFiles) ++ " recipes in " ++ recipeDir
+    results <- mapM testParse cookFiles
+    let failures = [(name, err) | (name, Just err) <- results]
+        ok = length results - length failures
+    mapM_ (\(name, err) -> putStrLn $ "\n" ++ name ++ ":\n  " ++ err) failures
+    putStrLn $ "\nOK: " ++ show ok ++ " / FAIL: " ++ show (length failures)
+  where
+    testParse fp = do
+        let name = reverse . takeWhile (/= '/') . reverse $ fp
+        content <- TIO.readFile fp
+        case parseCookFile content of
+            Left err -> pure (name, Just err)
+            Right _ -> pure (name, Nothing)