Query log: add flag or option to invert/negate the search

### Prerequisites

- [X] I have checked the [Wiki](https://github.com/AdguardTeam/AdGuardHome/wiki) and [Discussions](https://github.com/AdguardTeam/AdGuardHome/discussions) and found no answer

- [X] I have searched other issues and found no duplicates

- [X] I want to request a feature or enhancement and not ask a question

### Description

#### What problem are you trying to solve?
I would like to search the query log for queries that are not from a specific. But actual the search is to search for equality (==) but I can need to search for NOT equality (!=)

#### Proposed solution
Use the ! sign in front of the searchterm to change the search operation from equality (==) to NOT equality (!=)

#### Alternatives considered
Use a checkbox to change the search operation

#### Additional information