Improve heuristics for declarations

At the moment, `const` declarations and some `type` declarations are all formatted in the same way (when forced to wrap).
```delphi
const
A: TRec = (
A: 1;
B: 2
);
A: array of TRec = (
(
A: 1;
B: 2
)
);
// This one is weird/wrong
A =
(
18
+ 1)
/ 2;
type
A = (
A,
B
);
```
All of these constructs are different and should be treated slightly differently. Improving the heuristics would produce better formatting in the case of the expression to improve consistency across the formatter.