Add more filter keyword to "or" filter

[LIQRGV]

As enhancement for #3, we should allow "or" filter to use another keyword too.

Currently we have this filter keyword:

    private static $WHERE_QUERY_MAPPING = [
        "in" => "whereIn",
        "!in" => "whereNotIn",
        "between" => "whereBetween",
    ];

So, basically we should able transform this query param:
x_model?filter[a|b][is]=1&filter[c|d][in]=1,2,3&filter[e|f][!in]=4,5,6&filter[g|h][between]=7,8&filter[i][between]=9,10

into this filter

......  where 
            (a = 1 or b = 1) and 
            (c in (1,2,3) or d in (1,2,3)) and 
            (e not in (4,5,6) or f not in (4,5,6)) and 
            (g between 7 and 8 or h between 7 and 8) and 
            i between 9 and 10;