Promote sherlodoc parser to sources (#113)

(cherry picked from commit 412c3303afe2a01e90d96717fe08cf1e387148fa)

Co-authored-by: Ulysse Gérard <[email protected]>

Author: ncik-roberts

src/sherlodoc/.ocamlformat-ignore

@@ -0,0 +1,2 @@
+type_parser.ml
+type_parser.mli

src/sherlodoc/dune

@@ -4,6 +4,8 @@
 
 (menhir
  (modules type_parser)
- (flags --explain))
+ (enabled_if (<> %{profile} "release"))
+ (mode promote)
+ (flags :standard --explain))
 
 (ocamllex type_lexer)