Ensure github-linguist compatibility for the syntaxes

[huwaireb]

blocking github-linguist/linguist#7126

p.s ensured formatting using biome.

[smorimoto]

Could you take a look at this? @mnxn

[huwaireb]

@mnxn, there is a slight (non-blocking) issue with the linguist PR, I'd love to hear what you think on.

github-linguist/linguist#7126 (comment)

could we have a dune-all grammar that includes all stanzas (dune{-project,-workspace}) & base? Given the issue mentioned above.

Edit: See this comment to how we can do it, it'll be zero maintenance.
Edit 2: pushed it up

[huwaireb]

Not sure if this is a correct fix.

It resolves

- Invalid regex in grammar: `source.ocaml.menhir` (in `syntaxes/menhir.json`) 
contains a malformed regex (regex "`(?<![[:word:]][[:space:]]*)\(`": 
lookbehind assertion is not fixed length (at offset 26))

caused by [[:space:]]*.

[mnxn]

Previously, the regex would not match either a(b, c) = x or a (b, c) = x. But now the second string matches.
I don't know what the ideal solution is here, but at the very least, both of the strings above should not match.

Also, the regex should stick with [[:word:]] instead of \\w.

[huwaireb]

It seems like it accepts this (?<![[:word:]])(?<![[:space:]])\\(, can we do this instead? Rubular parses it fine, i can't seem to get it to make the vsix to try it out.

[mnxn]

Previously, the regex would not match either a(b, c) = x or a (b, c) = x. But now the second string matches.
I don't know what the ideal solution is here, but at the very least, both of the strings above should not match.

Also, the regex should stick with [[:word:]] instead of \\w.