(Ada) Minimal support for Ada 2022

[reznikmm]

Describe the issue
Ada 2022 introduces square brackets,@ and new parallel keyword. It would be nice to highlight them properly.

Which language seems to have the issue?
Ada 2022 standard

Are you using highlight or highlightAuto?
No idea. I use gitlab.

Sample Code to Reproduce

   X : Array_Type := [1, 2];

begin
   parallel
   for I in Grid'Range(1) loop
      Grid(I, 1) := 1;
   end loop;

• jsfiddle

Expected behavior

• parallel should be highlighted
• [ and ] should not be considered as invalid characters

Additional context