Add 'lint errors with context and full details' output mode

[fredemmott]

For example, something along the lines of input file:

function foo(): void {
  for($i = 0; $i < 10; $i++) {
    await bar();
  }
}

HHAST could optionally output something like...

  function foo(): void {
    for($i = 0; $i < 10; $i++) {
>     await bar();
|     ^^^^^^^^^^^
| DontAwaitInALoop Linter:
| blah blah blah more details here
    }
  }

Even if not directly useful, it would be good to use this for the unit test non-autofix .expect files - they would be much easier to review for correctness and completeness

[fredemmott]

actually, we basically have this, it's the default mode.

What's needed is to add /all/ the information that's in the JSON output to it to allow replacing the expect files

[jjergus]

also the AwaitInLoop linter intentionally overrides the default output to print out specific lines but doesn't point to the exact relevant node at each line