formula: output recommended/optional deps in JSON.

Fixes Homebrew/homebrew#47914 by distinguishing between required, optional, and
recommended dependencies when using `brew info --json=v1`. This is done
by adding the `optional_dependencies` and `recommended_dependencies`
fields to the JSON output.

A good example of this fix is `brew info --json=v1 dtrx`.

Closes Homebrew/homebrew#48196.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>

Library/Homebrew/formula.rb

@@ -1244,6 +1244,8 @@ class Formula
       "outdated" => outdated?,
       "keg_only" => keg_only?,
       "dependencies" => deps.map(&:name).uniq,
+      "recommended_dependencies" => deps.select(&:recommended?).map(&:name).uniq,
+      "optional_dependencies" => deps.select(&:optional?).map(&:name).uniq,
       "conflicts_with" => conflicts.map(&:name),
       "caveats" => caveats
     }