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

package.yaml

@@ -57,6 +57,14 @@ executables:
       - optparse-applicative
       - roux-server
       - unix
+  check-recipes:
+    main:        Main.hs
+    source-dirs: app/check-recipes
+    dependencies:
+      - directory
+      - filepath
+      - roux-server
+      - text
 
 tests:
   roux-server-test: