Add 'fromIntegral' inspection as anti-pattern

`fromIntegral` produces unexpected results for almost all types and is partial for `Natural`. We can recommend safer versions of this function.

* `toIntegralSized` from `base`

Additionally, we can add possible solutions for already existing `fromInteger` inspection:

* Suggest `integerToBounded`
* Suggest `integerToNatural`

Start by locating the existing `fromInteger` inspection and its tests, then follow how inspections produce suggestions. Add a `fromIntegral` anti-pattern inspection recommending `toIntegralSized`, and extend the existing recommendations with `integerToBounded` and `integerToNatural`. Done means the diagnostics and their expected suggestions are covered by tests.

Written by the indexing model from the issue text.