added action to filter

[matijahudin999]

Added an Action parameter to Filter in Entity.cs to allow for greater control of what happens to the DB query.

[lukaferlez]

This change is going to break a lot of existing implementation and usages, as you can see from the amount of test you need to change. This shouldn't be done.

Non breakable way is to introduce a new protected virtual method that would return the fields for mapping, so that the code looks like

Filter(...)
{
   foreach(var field in GetFilterConditions(filter)
   {
   ...
   }
}

protected virtual GetFilterConditions(TFilter filter)
{
	var changeTrack = filter as IChangeTrack;
	if (changeTrack == null)
		return [];

	return changeTrack.Changed;
}

Then the if someone wants to play around with that collection they can override that method and do

protected override GetFilterConditions(TFilter filter)
{
	var changed = base.GetFilterConditions(filter);

	!!DO YOU THING!!

	return changed;
}

[matijahudin999]

Refactored and written a filter that treats a datetime property as dateonly for the purpose of comparison