Card rules generator don't use target pointers

As example: Essence Capture (fix: 0b648343bc25fad65f9f72d6c54a4a8987e09e0a)

That's spell uses target pointer for second effect:
* `.setTargetPointer(new SecondTargetPointer())`

But rules generation in `AddCountersTargetEffect` uses first target only:
* `Target target = mode.getTargets().get(0);`

There are not so many affected cards (~100).

TODO:
* [x] implement targetPointer processing in rules;
* [x] search files for `mode.getTargets().get(0)` and replace it with
* `getTargetPointer().describeTargets(mode.getTargets(), "{default for empty/fixed target}");`

Most effects have been cleaned up. The remaining effects use a second target or need to check some other feature of the target, so more work would be needed:
- [ ] DamageMultiEffect
- [x] DamageTargetEffect
- [ ] DamageWithPowerFromOneToAnotherTargetEffect
- [ ] DontUntapInControllersNextUntapStepTargetEffect
- [ ] FightTargetsEffect
- [ ] PutOnLibraryTargetEffect
- [ ] ReturnFromGraveyardToBattlefieldTargetEffect
- [ ] TargetPlayerShufflesTargetCardsEffect