Statistics is not counted properly

[ameshkov]

Currently, the stats aren't counted properly:
https://uploads.adguard.com/up04_aa824_Monosnap.png

Here's what needs to be done:

1. Parse the filters tags in the filters.json: https://filters.adtidy.org/mac_v2/filters.json
2. If the filter has a purpose:privacy tag, increment the "blocked trackers" counter
3. If the filter has a purpose:security tag, increment the "blocked dangerous requests" counter
4. In ALL other cases, increment the "blocked ads" counter

[vityevato]

PR110