Ability to check multiple domains in the 'Check the filtering' feature

### Problem Description
I and testing out AdGuard home on my personal laptop. I am trying to keep the domain filterlists to a minimum. Currently using AdGuard DNS, 1Hosts Lite, OISD and Phishing Army Extended.

Additionally, for my personal Xiaomi mobile and iPhone + old iPad devices, I am testing out NextDNS to see if I am missing any rules based on their recommended DNS rules + Apple + Xiaomi native blocking.

I am also trying to stay away from StevenBlacks hosts as that is a compiled list from many different sources.

So far, in 15 days, I have added 13 custom blocking rules in AdGuard Home after filtering out the blocked requests, removing duplicates and then checking 443 unique entries in the Check the filtering textbox.

Will it be possible for you to provide a simple text file upload which can be parsed and then a report of which new custom rules have to be added can be displayed?

### Proposed Solution
Instead of a text box in which a single entry can be entered right now, provide a text file upload which will be parsed and a report of which entries need custom filtering rules is displayed.

### Alternatives Considered
This takes too much of my time. So wanted to know if there is an easier alternative to check missing entries against the filterlists.

### Additional Information
N/A