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

roux-server.cabal

@@ -51,6 +51,38 @@ library
     , warp
   default-language: Haskell2010
 
+executable check-recipes
+  main-is: Main.hs
+  other-modules:
+      Paths_roux_server
+  autogen-modules:
+      Paths_roux_server
+  hs-source-dirs:
+      app/check-recipes
+  default-extensions:
+      DerivingStrategies
+      LambdaCase
+      OverloadedStrings
+      TupleSections
+  ghc-options: -Wall -Werror -Wcompat -Widentities -Wincomplete-record-updates -Wincomplete-uni-patterns -Wmissing-export-lists -Wmissing-home-modules -Wpartial-fields -Wredundant-constraints
+  build-depends:
+      base >=4.7 && <5
+    , blaze-html
+    , blaze-markup
+    , bytestring
+    , containers
+    , directory
+    , filepath
+    , http-types
+    , optparse-applicative
+    , parsec
+    , roux-server
+    , text
+    , time
+    , wai
+    , warp
+  default-language: Haskell2010
+
 executable roux-server
   main-is: Main.hs
   other-modules: